I have a text file and i want to to read it line by line and put the lines into an array.
The snippet behind gives error while compiling:
FILE *f;
char line[LINE_SIZE];
char *lines;
int ...
|
I have these a file in a c program which consist of a string and 4 doubles and 2 integer in one line and there is a total of 28 lines, ... |
My file contains a series of numbers (integer, float, integer, float ....), each written on a separate line. The numbers of columns are different from one line to another i.e.
1 2.45 ... |
If I have an options file along the lines of this:
size = 4
data = 1100010100110010
And I have a 2d size * size array that I want to populate the values in ... |
im trying to read data from a file the file setup is like this:
3050 76
2030 60
1600 70
2222 50
2430 60
2800 50
0 0
the first number represents a student ID, the second number represents ... |
I have a file of the following form
-1,1.2
0.3,1.5
Basically a list of vectors, where the dimension of the vectors is known but the number of vectors isn't. I need to read each ... |
|
|
Hi all, My file has characters and numbers in the format given below: # 1 2 3 4 5 # 7 10 0 -5 8 I would like to read this file in C. Now everytime '#' appears it has to read the numbers below '#' and put them in an array say x[i][j]. It should increment 'j' everytime the program ... |
The code is given below: int main() { // ifstream constructor opens the file ifstream inClientFile( "example.txt", ios::in); // exit program if ifstream could not open file if ( !inClientFile) { cerr << "File could not be opened" << endl; exit(1); } // end if double itemsets[6][5]; int row = 6; int column = 5; cout << left << setw(5) << ... |
I am new to the C/C++ My Program: int main(int argc, _TCHAR* argv[]) { //Declarations FILE *fp; char line[1000]; char *CheckPoint[3000]; //Opening a file and reading fp = fopen("C:\\config.txt","rt"); while(fgets(line, 1000, fp) != NULL) { char datatext[1000]; sscanf (line, "%s", &datatext); printf ("%s\n", datatext); CheckPoint[i] = datatext; } //Closing File fclose(fp); return 0; } //Config.txt Data 10 20 30 40 My ... |
|
|
The problem with reading the data file is on line 46. You are declaring a local ifstream inside the subroutine. This means you have two ifstreams declared in your program. One that has opened a file (in main) and one that hasn't ( in readdata). Watch out here, even though they have the same name, they are different. This is what ... |
A problem that I notice is that you are defining pointers to characters, but you are NOT initializing where those pointers point. For example char *buf getline(buff,256) will write the data from file to a random location - who knows where? Better is: char buf[258] getline(buff,256) which will write your data to somewhere that the compiler has laid aside for the ... |
theballz@orcon.net.nz Hi, I am learning c programming and come across a problem i cant seem to solve. I have a file which i wish to parse and put certain lines (which do not contain a hash character) into an array and then output the contents of this array. The file seems to be parsed properly and the array gets populated but ... |
It might help if you post a small sample of the typical text you're trying to read, as well as what you intend to do with it. (Knowing how it's formatted would help others on this forum to determine the easiest way to read it in. Knowing what you plan to do with it will help to determine if you need ... |
I need some help reading in a file that has a column with the student's name and then a column with their score. I need to input this into 2 seperate arrays. One for the names and one for the scores. I have to use a String Array and a Int Array. I can't figure out how to get it into ... |
Hi I am new to this so I dont exactly know the format in which to post the questions ....anyways here goes ...my file looks like this Year,Day,MOnth,latitude,longitude (commas included) 1973,30,06,36.65,144.70 1973,31,07,35.50,145.08 ------ ---- and so on ...what I need to know is how I can store it into multiple arrays of date[],day[],month[],lat[],lon[] AND GUESS WHAT ...THERE IS A CATCH ....THERE ... |
Hello. I am trying to print out the entire contents of a file. I have to read the contents and store them into an array of structures. when ever I run my program, It does not print out any thing and once it finishes the loop it crashes. Please help. Thank You. Here is my code: Code: #include #include ... |
|
Write a program that a. Opens the data file noisedata.txt and reads the dc, gt, and snr values into arrays. (You must use the exact file provided with the problem statement, including the text headings.) Noisedata.txt This data file is arranged as follows The number on a lone line is the dopant concentration in atoms/cucm x 1.00E-17 The next five lines ... |
OK, I have a text file that has "1,2,3 d, e, 6,6, h,h, ...etc" I want to put all the digits into an array for analysis. So the array size known. I am able to open the file and filter the desired digits, but I can't seem to store the numbers into the array properly. In the array I should see ... |
Hi, i have declared label as a global function hence it is nt shown, also the function parser works fine ( coz the code executes w/o any issues when the file operations are not done) , also the function has nothig to do with the file i.e the function parses the input provided by the user. I tried debug mode using ... |
hi, can someone give me the idea on how to read the following file (student's mark text file) using array No Matrix quiz1(5%) quiz1(5%) quiz1(5%) Proj(25%) MidT 1 BK20008 4 3 5 18 18 2 BK20002 5 5 4 10 8 3 BK20003 3 4 5 18 10 4 BK20006 4 3 4 20 14 5 BK20005 5 4 3 13 ... |
|
#include #include #define NROWS 8 #define NCOLS 7 int main (void) { FILE *input; int i; int j; double power[NROWS][NCOLS]; input=fopen("power1.dat", "r"); if(input==NULL) printf("Error opening input file. \n"); else { for(i=0; i |
#include typedef struct{ int avg_high; int avg_low; int avg_wind; float avg_precip; } weather_t; const int nbr_months = 12; const char weather_file [] = "weather.txt"; FILE * fptr; int loadstats(FILE * wfile, weather_t wstats[]); void printstats (weather_t wstats[]); int main(void) { fptr=fopen("wfile", "r"); //I have opened the file, but how do I place it into the array? return 0; } int ... |
The "import" of the data would best be done by fgets() to read a line, and then suitable line-parsing. Depending on the format you have two choices: 1. manually separate out the portions of the string, using for example strtok(). Once you have the component of a string, you would use strcpy() to copy string data and the strtod(), strtol() functions ... |
Code: #include int lines,i; double *t, *x, *P; int main(int argc, const char *const *argv) { if ( argc > 1 ) { FILE *file = fopen(argv[1], "r"); /* Get filename from command line. */ if ( file ) { int ch, prev = '\n' /* so empty files have no lines */, lines = 0; while ( (ch = ... |
Hi I am actually a c++ developer but I am trying this prog in c. It is not completed but I am trying to read data from a file. There are3 columns seperated by spaces. I read the data from a file and each time a new row is read it must overwrite the data that was in the arrays. I ... |
#include #include int main() { int i, j, x, y, m[100], n, z; FILE *infpt; infpt=fopen("data1.dat", "r"); printf("\nAddress of file infpt = %p\n", infpt); for(i=1; i<=1; i++) { fscanf(infpt,"%d %d", &x, &y); printf("Dimensions:%d x %d \n", x, y); } float b[5][5]; //fscanf(infpt,"%d %d", &i, &j); for (i=0; i |
I am fairly new to C and would like to read a file into an array so that I can access the data quickly. I think that I should be using pointers (or an array of pointers) to make effecient code. I get the basic premise of pointers (variables that hold the address of another variable in memory) but have obviously ... |
|
int main (void) { FILE *datafile, *dataout; int fromfile[200]={0}; int a=0,count = 0, b = 0,e=0 ,s=0, count2 =0; if ((datafile = fopen ("datafile.txt","rt")) == NULL) { printf("\nError opening input file, program exiting\n"); return(1); } if ((dataout = fopen ("dataout.txt","wt")) == NULL) { printf("error opening output file, program exiting\n"); return(1); } printf("\nProgram reading data from file\n"); do {fscanf(datafile, "%d", &fromfile[a]); printf("."); ... |
|
void prep_product_report(){ FILE *fp; int i; int prod_codes[12]; char prod_desc[12][30]; int salesman_no[10]; char salesman_name[10][30]; if((fp = fopen("salespeople.dat", "r")) == NULL) printf("Can not open salespeople.dat file.\n"); else{ rewind(fp); for(i = 0; i<10; i++){ fscanf(fp, "%d;%s", salesman_no, salesman_name[i]); } fclose(fp); } if((fp = fopen("products.dat", "r")) == NULL) printf("Can not open products.dat file.\n"); else{ rewind(fp); for(i = 0; i<12; i++){ fscanf(fp, "%*d;%s", prod_codes, prod_desc[i]); ... |
#include #include int main(void) { char text[8]; size_t i, count = 0; FILE *file = fopen(__FILE__, "rb"); if ( file != NULL ) { count = fread(text, 1, sizeof text, file); fclose(file); } for ( i = 0; i < count; ++i ) { printf("text[%lu]", (long unsigned)i); printf(isprint(text[i]) ? " = '%c'\n" : " = 0x%02X\n", text[i]); } return(0); ... |
|
#include #include #define MAXLINE 10 void main(void) { char* readline[MAXLINE]; FILE *infile; char* line; int ch; if((infile = fopen("info.txt", "r"))==NULL ) { fprintf(stderr, "Error: Cannot open input file. "); exit(1); } line = (char *)malloc(sizeof(char)); while(fscanf(infile, "%s", line) != EOF) { printf("%s\n", line); while (ch = fgetc(infile) != '\n') { advice..... } } } |
#include #include #define NUM_STU 5 typedef struct { char name[26]; int midterm[3]; int final; } STUDENT; int main (void) { STUDENT *pStuPtr; STUDENT stuAry[NUM_STU] = { {"Charles, George",{85, 94, 79}, 93}, {"Adams, Karin", {75, 91, 89}, 89}, {"Nguyen, Tuan", {87, 88, 89}, 90}, {"Oh, Bill", {78, 96, 88}, 91}, {"Chavez, Maria", {83, 79, 93}, 91}, }; printf("Unsorted data:\n"); for ... |
|
Hello, I have a rather large program to write, so I'm writing this one in small chunks rather than all at once. As I have it for the moment, the program reads in a .dat file and stores it in an 2d array. The .dat file consists of a 10x10 maze of 1's and 0's. I am getting the file to ... |
please i been working with a program for two weeks and i still can't figure out how to copy a file into a dinami array. the file contains 2415 words. my program copy the data but out side of the the while loop it doesn not work any more it just apears the last words of the file and i want ... |
basically its part of a bigger program but its this bit that doesn't work. its supposed to read the numbers from a txt file (datafile) and write them to an array (fromfile) the datafile can look like this but it can be up to 40 lines 105683,23,65,0,100 105475,96,72,35,61 105286,23,45,15,86 104762,23,17,5,56 this is what i have so far. Code: int main (void) ... |
Ok yea, that works but I get an access violation. The program runs and prints the contents to screen and does the last bit where it tells the user to press return to quit. It then holds awaiting the user to press return. Once return is pressed I get the following: Access Violation at 0x3939: read of address 0x3939 Anyone know ... |
Hey guys/gals, I'm having a little trouble trying to figure out how to set up a program. I am supposed to read in 5 class data members from a file and then sort these class data members into a 3d array. Information listed in file: Field 1: (int) part number Field 2 (string), 3 (float), 4(int), and 5(int) I understand what ... |
Bitmap files have a header, and they have data which is formatted into special records which matches information in the header. If you alter the bitmap, the header has to change. Go to http://www.wotsit.org http://www.msdn.microsoft.com has examples of working with bitmaps mostly in MSVC++. The format you want is BMP - they have full documentation. |
Greetings, I am anolder man who has gone back to school and I haven't written a program since FORTRAN & COBAL. In fact the last programming I did was when we were setting pins on collator boards for use in punch card collators. Here is my problem - I am trying to read a data file of 10 numbers into a ... |
Hi, I am able to write to a file without any trouble, but when the file is reopened, only the first set of records is being read to the arrays. I can have 50 sets of data in the file, but when the file is opened only the first is read, and subsequently when the program is terminated, only that one ... |
I have a file with 2 columns of data within it. I am trying to read the data into 2 seperate arrays. The problem is that it is not reading the data in. Here is what I have: FILE *file1; file1 = fopen("point.dat","r"); while(fscanf(file1,"%f %f\n",&arr[i],&arr2[i])>0) { i ++; count = count+1; } fclose(file1); printf("%f\n", arr, arr2); Thanks |
|
How would I go about reading this file into an array.. I can read them in np. Just having an hard time trying to put them in an array. Data File: 1002 Mc Carthy Tom d 1952 1004 Smith Sara r 1980 1005 Harrison Ron C 1966 12000 Roberts John L 1948 5000 Kent Clark R 1987 6000 Stone Sharon D ... |
I am read from a file. I want to get the first line into a string and the second line into array, the third line into string and the fourth line into the array and so forth. The string part is okay but I have problem with the array part. I can get the length of the string but don't know ... |
OK I have a text file looking like this [file] title1 s1title1 s2title1 s2title2 s1title2 s2title1 s2title2 [end of file] but this file can have unlimited number of titles. i am reading it in line by line and then want to put each line in some kind of array. but because i do not know how many lines there will be ... |
// this is the grading sorting program for part one #include int main(int argc, char **argv) { FILE *fp; // file pointer, points to the file char file_name[32]; // store file name int ID[50]; int grade[50]; int a,b; // index variables int student_id, grades; // opening file by asking the user for the file name printf("Enter the name of the ... |
#include #include #include using namespace std; int *speechyes; void main(char argc, char *argv[] ) { FILE *fp1,*fp3; //if ( argc != 3 ) //{ // printf("differ fileone filetwo\n"); // exit(0); //} fp3 = fopen("yes1.wav","w"); //fp1 = fopen( argv[1], "rb" ); if(!fp1 ) { printf("Error opening file %s \n"); } int k=0; speechyes = new int[50000]; while(fread(&speechyes[k],2,1,fp3)==2) { k++; ... |
int main() { // Declare Variables char temp[25]; int length; // File Pointer FILE *file; // Open files and verify success file = fopen("test.dat", "r"); if(file == NULL ) { fprintf(stdout, "test.dat failed to open. exiting...\n"); exit(1); while (!feof(file)) { fgets(temp, 25, file); // Get length from file length = atoi(temp); // convert string to integer printf("Length is %d\n", length); v_array(length, ... |
#include FILE *fi; FILE *fo; int main() { float a[20]; int i, n, x, z; float limit; char line[50]; char letter[5]; i=0; fi = fopen("input.txt", "r"); fo = fopen("output.txt", "w"); while (fgets(line,20,fi)!=NULL) { sscanf(line,"%3f2", &limit); a[i] = limit; i++; } printf("How many numbers would you like to input? "); scanf("%3d2", &x); for (n = 0; n < x; n++) { ... |
#include #include int main() { struct { char origin[50]; char destination[50]; char flight[10]; char aircraft[3]; char days_of[7]; char departure[4]; char arrival[4]; char begin_date[10]; char end_date[10]; }flight_details[1679]; FILE *fp; fp=fopen("iaschedule-07(edit).csv","r"); char buf[50]; int i; while( fgets(buf,sizeof(buf),fp) != NULL) { strcpy(flight_details[i].origin, strtok(NULL,",")); strcpy(flight_details[i].destination, strtok(NULL,",")); strcpy(flight_details[i].flight, strtok(NULL,",")); strcpy(flight_details[i].aircraft, strtok(NULL,",")); strcpy(flight_details[i].days_of, strtok(NULL,",")); strcpy(flight_details[i].departure, strtok(NULL,",")); strcpy(flight_details[i].arrival, strtok(NULL,",")); strcpy(flight_details[i].begin_date, strtok(NULL,",")); strcpy(flight_details[i].end_date, strtok(NULL,",")); ++i; } printf("print details\n"); for ... |