I am passing a string as an argument to my program and extracting its position in a text file.
Can we read a text file only upto this certain position in ... |
I have a text file which contains words separated by space. I want to take each word from the file and store it. So i have opened the file but am ... |
At the moment my program has no problem reading in a .txt file, but my program needs to read in a text file with a different file extension (.emu is the ... |
I need to write a program in C that reads data from an existing file, say studentgrades.dat. Each student's info is written in two lines. Last Name, First Name on the ... |
I know this is a dumb question, but how would I load data from a multiline text file?
while (!feof(in)) {
fscanf(in,"%s %s %s \n",string1,string2,string3);
}
^^This is how I ... |
my text file is like this (the data in the file can also increase)
822
172.28.6.56
172.34.34.53
3244
...
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I have the following text file:
ax: 0
ay: -9.8
x: 0
y: 50
vx: 8.66
vy: 6
I want to read only the numerical values to be used for computations. Is there a way to ignore ... |
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I have a C# .Net 4.0 Project which needs to read text files and parse them - very simple.
The files are located in C:\Testing\Docs
When I try to open a text file ... |
This is most likely a dumb question!
I have a text file filled with random numbers and I would like to read these numbers into an array.
My text file looks like this:
1231231 ...
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I want to read a list of keywords from a (text) file and then add those in a CString array in C. The trouble is that, I am reading the file ... |
I've searched high and low, but can not find the answer to what I would've thought to be a rather simple question. I'm rather new to C, and due to the ... |
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I want to write a program using C to read a sets of data from text file. 5sets of data as shown below. 1st column is label and follow with its value from index1-25...(index : value). 1 1:0.736553 2:0.769987 3:0.736553 4:0.620231 5:0.642820 6:0.575940 7:0.592416 8:0.672809 9:0.526718 10:0.611134 11:0.704128 12:0.728041 13:0.761181 14:0.697038 15:0.733756 16:0.554738 17:1.000000 18:0.766591 19:0.692934 20:0.556762 21:0.033290 22:0.007517 23:0.015536 24:0.000000 ... |
I've written some code that reads a text file. I have a requirement that the text file also be in a format that's easy to read when it's printed. In a prior project, I had used some spreadsheet commands to generate the text data in a neat format by inserting variable numbers of spaces for each data item, based on the ... |
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i have a text file lets say in this format abc abs ajfhg agjfh fhs ghg jhgjs fjhg dj djk djghd dkfdf .... .... ...... i want to read the first line at certain time for eg : at 10clk and the next time when i am reading the text file for eg a timeout of 10 min (@ 10:10) i ... |
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I hate to break this to you but you are using ifstream and the >> operator and these are part of the STL. You have to throw your C++ book in the garbage and a copy of the ANI C Programming Language from , oh say, 1988 and then learn how it was done twenty years ago. That is you need ... |
Hi Poojagupta, I think your fscanf returns some failure status, otherwise there is no chance for looping. please check the returns status. i fell from "1,2,3,4,5,6" the "," is problem creater, so try with "1 2 3 4 5 6". get back me , still if your facing the problem. Regards, Arul |
I am new for C++, i am writing a program to read a text file to get some values at the sametime read another file that is .LBJ format to get some values and calculate the difference. but my problem is, in those two files there are some description before the values start. i want to eliminate those description which start ... |
It runs to the line "while (getline(nameFile,nameList[countName])) ". On this line nothing happens. I just solved the problem, it seems that I coudn't get the line directly to my vector. I had to read to a string and after that puch_back to my vector. Heres my new code. If anyone got another way to do it so please show it. // ... |
It might be a good idea to use getline to process each line. But why are you even ">> ing" six variables if each one of your lines contains four? That's probably why your program gets stuck, you ask for too much input. getline is the wrong thing to use here. An >> into four variables should do the trick. If ... |
I presume the records in the file are 255 or less. Your getline should be 256 since that is the size of str. Either, the \n is encountered and converted to a \0 or it's not and you have no \0 in str. So, you don't need to allow for it in getline. Next, sscanf(), like all scanf()-type functions, stops scanning ... |
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This is a input file DEL 0050 XYZ 0050 0310 CCU 0710 MAA 1325 TRZ 10415 KWI 0050 FJR 0325 0325 CCJ KWI 0050 FJR 0325 0425 CCJ 0925 1005 i.e maximum items(column entries) in a row can be 8 but their data type will be in same order i.e char int char int int char int int i am simply ... |
Hi all, i am trying to write a program in c++ that will read a text file line by line using the get line command and then be able to break the string read up into various parts. for example it may use the getline command to read a line "Hello World" from a file into the string word. so now ... |
I have a small text file which consist of the following data: [[[ -1 -1 -1 1 You are in a small square room. 0 -1 -1 -1 You are in a big round room. ]]] And the code I've written is as follows: [[[ Rooms getRoomDataRecords(string roomDataFile) { Rooms rooms; ifstream ifs(roomDataFile.c_str()); if (!ifs.is_open()) { cout << "Eh? Could not ... |
Claude Yih Hi, everyone. The other day I wrote a piece of code to see how the UTF-8 text file was saved in the memory. Although the code worked seemingly well, I still cannot understand a problem about the output format. The code is like this (I ignored the #include and #define here) : int main(void) { FILE* fp = NULL; ... |
I'm trying to read from an input text file and print it out. I can do this by reading each character, but I want to implement it in a more efficient way. So I thought my program should read one line at a time and print it out. How can I do this? I wrote the code below but it's not ... |
In article <1132630154.432640.239300@g47g2000cwa.googlegroups .com>, Michael McGarry wrote:[color=blue] >I am reading strings from a text file using fscanf("%s", currToken);[/color] [color=blue] >This returns strings delimited by whitespace. How can I tell if the >string was followed by a carriage return in the file?[/color] The whitespace character (including newline) that terminates the string will be "put back" into the input stream. Therefor to ... |
#include int main() { FILE *fp; fp = fopen("lol.txt","r"); char Type; char condition; int total_vertex; int vertex; int v_origin; int v_destiny; fscanf(fp,"%s %d",&Type,&total_vertex); printf("In this graph there is a total of %d vertex.\n",total_vertex); while(!feof(fp)){fscanf(fp,"%s %d %s",&Type,&vertex,&condition);} while(!feof(fp)){fscanf(fp,"%s %d %d",&Type,&v_origin,&v_destiny);} if(v_origin==vertex) { printf("Vertex %d has the condition %d and his heir is %d",vertex,condition,v_destiny); } return 0; } |
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Code: #include #include #define LINE_SIZE 80 /* # characters per line. */ #define SCREEN_LINES 24 /* # lines per screen. */ /* This function displays the contents of a text file * one screenful at a time. * It returns 0 if successful and -1 otherwise. */ int DisplayFile(char FileName[]) { FILE *fp; char LineBuffer[LINE_SIZE], *ptr; int LineCount = 0; ... |
Code: #include #include struct myNode{ char name[30]; //note this isn't a pointer int number; }; //just used to make our file void createFile(void); int main(void){ //used for file line input char inputBuffer[100]={0}; FILE* myFile; int current=0; //I am using an array but this would be your linked list struct myNode myNodeArray[5]; //--------------------- //just makes our file to read in ... |
I have data file like this. I want to read this file in C. After reading this file I want it to be stored in variables like this M=5 N=8 NRHS=3 JSGN=0 IOUT=0 JDCYC=0 From the second line onwards since KC(1) =1 it should have JJ(1)=5 values and third line details the values KM(1) =1, KL (1) =120 , KM(2) =5, ... |
Code: #include #include int main () { FILE * pFile; long lSize; char * buffer; size_t result; pFile = fopen ("http://www.radar4u.com/REAB_groto/downld02.txt" , "rb" ); if (pFile==NULL) {fputs ("File error",stderr); exit (1);} // obtain file size: fseek (pFile , 0 , SEEK_END); lSize = ftell (pFile); rewind (pFile); // allocate memory to contain the whole file: buffer = (char*) malloc ... |
I am trying to read records from a text file. What is the best way to do this? Here is what I did in my program: fgets(sentence,500,myfile); sscanf(sentence,"%s%s%s%s%s%s%s%s",tempId,tempPric e,tempDate,myOffice,tempSold,tempCon,tempBed,tempA dd); I used fgets() to get the target line of text from the text file and save it in my array "sentence". Then i use sscanf to get each piece of data, ... |
char array[100]; char line[100]; FILE *f; f = fopen("textbook.txt","r"); if(f == NULL) { printf("Error opening file\n"); return 1; } for(x=0; x<100; x++) line[x] = '\0'; if ( f != NULL ) { x = 0; while ( fgets ( line, sizeof line, f ) != NULL ) { strcpy(array[x], line); x++; /* I'm struggling here, I'm not sure how to store ... |
A successful call to the fclose function causes the stream pointed to by stream to be flushed and the associated file to be closed. Any unwritten buffered data for the stream are delivered to the host environment to be written to the file; any unread buffered data are discarded. Whether or not the call succeeds, the stream is disassociated from the ... |
Hey, im new at "C" but i am developing fast, i understand file handling and can read from and to files. the problem is im workin with .ama files, dont worry these files are just like .txt but have a different extention. the problem is, the encoding setting on these files is UTF-8, which if u go into notepad you have ... |
#include #include int main() { char *temp="name",*temp1="=",*temp2="age",*string; int i=0; struct str_name { char *name; int age; }object[1]; FILE *fp; clrscr(); fp=fopen(file_name,"r"); while(getc(fp)!=EOF) { fscanf(fp,"%s",string); if(strcmp(string,temp)==0) { fscanf(fp,"%s",string); if(strcmp(string,temp1)==0) fscanf(fp,"%s",object[i].name); } if(strcmp(string,temp2)==0) { fscanf(fp,"%s",string); object[i].number=0; if(strcmp(string,temp1)==0) { fscanf(fp,"%d",&object[i].age); i++;} } } printf("Name: %s\nNumber: %d",object[0].name,object[0].age); //now the structure will contain the details of the file in corresponding order getch(); return(0); } |
// Read in NetlistFile FILE *fp= fopen(NetlistFile,"r"); LogicGate *LogicGates = malloc(200 * sizeof *LogicGates); int index = 0; // Get nGates and nNodes while(fscanf(fp, "%d %d", &nGates, &nNodes) == 2) // Print to screen printf("\n %d %d", nGates, nNodes); // Get Gate data and structure while(fscanf(fp, "%s %d %d %d", &LogicGates[index].GateType, &LogicGates[index].OutputNode, &LogicGates[index].InputNode1, &LogicGates[index].InputNode2) == 4) // Print to screen printf("\n ... |
Hi everyone, I need a help on my assignment: I am given text file(Includes a simple list of 4 candidates with their party, last name, first name and number of votes) I need to write a c program which: 1. accepts the name of the data file as a command-line argument. 2. Reads this file and stores the information in it ... |
Hello, I have a problem with finding the end of the text file. I created a piece of code to scan my txt file for the commands, but the problem is that for some reason one of the commands gets implemented twice. I checked everything and the problem is in this piece. It's like feof finds the end of the file ... |
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#include void stripnl(char *str) { while(strlen(str) && ( (str[strlen(str) - 1] == 13) || ( str[strlen(str) - 1] == 10 ))) { str[strlen(str) - 1] = 0; } } int main() { FILE *infile; char fname[40]; char line[100]; int lcount; printf("Enter the PERT Data File: "); fgets(fname, sizeof(fname), stdin); stripnl(fname); if((infile = fopen(fname, "r")) == NULL) { printf("Oops! An error ... |
Segmentation fault when reading very large text files Hello all, I've created a fairly simple C program to search a text file for a pattern supplied by the user. I have test files that are 1MB (17k lines), 10MB (174k lines), and 100MB (1.74 million lines). The first one that reads 17k lines of text runs perfectly, but the other two ... |
Hi there, I'm undergoing my first year of study in C programming. I was wondering if anybody could point me in the right direction for some homework I have. I've been given a text file, which contains data that needs to be sorted into nodes and then arranged into a linked list. So, say the data is in this format: age: ... |
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#include #include #include /*Purpose: get city name from user See if cityname is in the file. If it is print population Problem occur when type in a city there are two cities with similar name it will print both out. e.g INPUT : St. Louis OUTPUT: St. Petersburg */ int main() { FILE *fp=fopen("e:\\city.txt", "r"); char city[256]; char ... |
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I'm very new to C and I'm learning about file IO. Right now I'm trying to read from a txt file and I know that the first thing in the txt file is some number, as large as the largest possible int value. I think I'm missing something because what I'm attempting to do is input it, with either fgets or ... |
Basically what i'm trying to do (sorry if this has already been answered; i haven't found anything like what i need.) is read in a file (text based) and have 3 variables. 1) Name, 2) Another name, 3) Unknown length of a message. It is in a C program and fscanf just isn't cutting it for me. I have tried using ... |
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Okay, so you've managed to create a loop, but it's not much use because it insists on reading exactly 5 characters from the file. What you want is a loop that continues until you read the end of the file or an error. Look up what getc() returns when such a condition is reached, and adjust your loop accordingly. You're not ... |
Well, it looks like you have prepared a set of specifications, which is what you would give someone else if you wanted them to write a program for you. Since that is not the case, you have made your own task somewhat easier anyway. Now you just have to do it! But slow down again... Can you open one file and ... |
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Hi all: I have been given a text file full of text pattern as shown below: # VIEW OBJFILE = iiomsview16.V VIEW II_STD_HEADER_T # TYPE CNAME FBNAME COUNT FLAG SIZE NULL VALUE # ----- -------- --------- ----- ---- ---- ---------- string hd_cd1 HEADER_CD 1 - 13 " " string hd_text HEADER_TEXT 1 - 41 " " I need to read this ... |
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Hi, I have been set an assignment where i have to work out mileage price ect from the following chart which is stored as a text file ( data.txt ) London Bath Cardiff Carlisle Durham Exeter Leeds Norwich Truro York London - 23 12 89 456 123 46 732 345 123 Bath 23 - 46 234 123 46 89 234 567 ... |
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Hi All, I'm new to C-programming, and I'm trying to read a text file. Here's my code so far. Code: #include 2 #include 3 #include 4 #include 5 #include 6 #include 7 #include 8 #include // external int errno 9 10 #define ACC_RIGHT 0644 /* User: Read+Write, Group and Other: Read */ 11 ... |
Code: #include #include #include typedef struct { char l[20]; struct List *next; } List; List *insertList (char head, List *tail) { List *t = calloc (1, sizeof (List)); t -> l = head; t -> next = tail; return t; } static FILE *open_file (char *file, char *mode) { FILE *fp = fopen (file, mode); if (fp == ... |
(Back again, yes I know...) Anyways, for my current program, the last bit involves saving an inputted structure to a sequential text file, then loading it again later. Here's the current save and load functions, as well as functions that encode and decode spaces: Code: void spacereplace() { int cnt, cnt2, l; for (cnt = 0; cnt < listcnt; cnt++) { ... |
Hello, I'm new to programming and I have a question about reading text from a file and I don't know how would be the best way to do it. For example I have a text file containing a few words or numbers placed in this way as below: 4 pears oranges apples bananas Now if I want to get only the ... |
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#include #include int main() { //********************************** // Open "animals.txt" input file //********************************** // animal data FILE *f; char s[500], a1[20], a2[20], a3[20], a4[20]; char file_name[10][10], ch [10[10]; f=fopen("file_list.txt","r"); if (!f) return 1; while (fgets(s,sizeof(s),f)!=NULL) //while not EOF // scan one line at a time sscanf (s, "%s %s %s %s",a1,a2,a3,a4); strncpy (ch[i], a1, 9); file_name[i][1] = ch[i][1]; printf("file_name = ... |
Code: #include int main(void) { static const char filename[] = "file.txt"; FILE *file = fopen(filename, "r"); if ( file != NULL ) { char line[128]; while ( fgets(line, sizeof line, file) != NULL ) { int i; if ( line[0] == '\n' ) { puts("blank line"); } else if ( sscanf(line, "%d", &i) == 1 ) { printf("i = %d\n", ... |
Hi, I am trying to learn how to read from text files but have a few questions about it. Here is my code: Code: #include int main() { char ch[9]; int i =0; FILE *file; file = fopen("list.txt", "r"); if(file == NULL) { printf("Cant open file \n \n"); } else { printf("file opened \n \n"); } while(i<15) { fgets(ch, 8, ... |
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#include #include int main( void ) { FILE *fp; if (( fp = fopen( "info.txt", "r" )) == NULL ) { printf( "Input file could not be opened\n" ); exit( 1 ); } if ( fclose( fp ) == EOF ) printf( "File couldn't be closed\n" ); return 0; } |
Code: #include int main ( int argc, char *argv[] ) { if ( argc != 2 ) /* argc should be 2 for correct execution */ { /* We print argv[0] assuming it is the program name */ printf( "usage: %s filename", argv[0] ); } else { // We assume argv[1] is a filename to open FILE *file = fopen( ... |
int Scan_File(FILE *file,int *iNumLines, int *iLineWidth) { int iCharCount = 0 ; unsigned char ch = ' ' ; if(file == NULL) return 0; *iNumLines = 0 ; *iLineWidth = 0 ; while((ch = fgetc(file)) != EOF) { if(ch == '\n') { iLineCount++ ; if(iCharCount > *iLineWidth) *iLineWidth = iCharCount ; iCharCount = 0 ; *iNumLines++ ; } else iCharCount++ ; ... |
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Ooops, I forgot to change it from a different piece of code. I'm using a C++ compiler to compile C code, so it recognised it even though the file was .c. I'll turn that into char arrays. Aside from that, if I don't know how long the name "var 1" is I can't make the array to fit the exact size, ... |
Reading text file and structuring it.. Ok pretty much a newby in programming in C. Can read some data and put it in structures. Just the basic stuff that I had to do and learn at University. However, I now have to write XML in C. I am left up with a text-file that looks like this. Btw..This is not home ... |
Assuming that this is for a school assignment, I'll try to provide the proper kind of assistance. First of all, think of how large you should make your array when the program starts. Once it's made, it can't be changed unless you make a new one and copy contents over. To read the characters from the file, have a look at ... |
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I am having a problem in reading a text file in which data is written in columnar format seperated by tabs like 1 10 100 2 15 200 and i am using the following code using fscanf but when it encounters tab it enters a end of line character #include int main() { FILE *textfile; char line[80]; char Templine[80]; clrscr(); ... |
I am creating a program where I have to rotate an image 90', 180' and 270'. The file being read in is an image file converted to numbers and these are read into an array. The image is 60 ROWS by 60 COLS, the array being Picture2 To rotate the image 90' i am doing the following; for (i=0; i |
The fscanf will not work correctly on the "mickey mouse" field. It will copy "mickey" into the variable (it stops copying when it reaches a white space character). Long winded, but try this. #include "stdio.h" #include "stdlib.h" #include "string.h" static void ParseFunction(char *FileBuf, int *int1, char *str1, int *int2, float *float1); static void CopyStrField(char *FileBuf, char *str1, int *x); static void ... |