I'm stuck on this. Currently I'm using:
FILE *a = fopen("sample.txt", "r");
int n;
while ((n = fgetc(a)) != EOF) {
putchar(n);
}
However this method seems to be a bit inefficient. Is there any ... |
Is there a way to print an entire file, character by character, without know it's length or worrying about how many lines it has?
Right now I read a file and count ... |
I am trying to store every hex value from 0000 to fffe into a file. How would I use fwrite or fprintf to place these values into a file?
At the ... |
I think the title is self-explanatory. Would be handy for large files with lots of style violations. Thanks guys :)
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I read this topic, but his problem maybe different from mine
Writing to both stdout & a file
I want to write a fuction, that function need to print out to both ... |
I'm playing around with fgetc and was wondering how I would get my loop to print the line section once then print the first 16 characters.
Here is my code:
int main(int argc, ...
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I'm a beginner to C but not too bad at programming all around. I'm writing a program in C that calculates the path of an object (x, y, and z coordinates) ... |
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I'll try to simplify and make clear my other question here. I am basically trying to use gdb to see where myfile.c is segfaulting. However, I cannot directly examine myfile.c under ... |
I am trying to print a Gtk Window using the print functionality provided by Gtk (e.g using api's like gtk_print_operation_run). The Gtk Print Window does n't show the "print to file" ... |
Use two arrays. Store the words in one array and the counts in the other. Read a word, search the array and if yu find it, say in element 10, then increment the count in element 10 of the other array. Now you have your words and the counts for those words. There are other solutions but for beginner's homework, the ... |
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If you can not find a utility to do this, Wireshark itself has a basic export to text file. If that wont do then you can access the data through the winpcap library or the file format is available here for you to decode the file yourself directly. A lot of the information displayed by Wireshare is not stored in the ... |
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I need to print a bitmap file in C under Windows. I'm a senior in college so please show me the respect I'm due. I don't want any of you jokers telling me that it can't be done because I know it can. Post the code here no later than Friday by noon, please. I'm counting on you guys to come ... |
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Hey There, I'm learning C++ two different ways (in a class and through a book). right now i'm stuck (getting ahead) and i'm looking how to print a simple text file. problem being that on my computer i do not have a printer (as i'm making a program for a friend) and need to print a file which is the only ... |
Hi, I'm trying to create a menu for a program by printing a data file. This is what it looks like WELCOME TO MAZE-RUNNER DEMO THIS IS NOT YOUR MAZE RUNNER! This is a demo of possible Maze Runner Levels. The Levels are: Level 0: Drive the Mouse. You may use the a,s,d,w commands in the predefined visible maze. Level 1: ... |
So, I just started Binary Search Trees in class this week, and this is part of a sample program to print student names to the stdout. For my program that I have to do I must print to a file, now I have tried a lot of times and the problem is that when I create a file in my "processStu" ... |
Code: void ld_apps() { FILE *fp; fp = fopen("G:/Uniwork/Semester2/ProceduralProgramming/Assignment/Appointment.txt", "rt"); if (fp == NULL) { printf("\nUnable to Open Input File\n"); exit(EXIT_FAILURE); } else { printf("File Open\n\n The Appointments are Shown Below\n\n"); } while ( !feof ( fp )) { Appointments++ ; printf("\n\nCurrent Number of Appointments: %d", Appointments); { fscanf(fp, "%s", PrAppArray[0].name); printf("\nName: %s", PrAppArray[0].name); fscanf(fp, "%s", PrAppArray[0].surname); printf("\nSurname: %s", PrAppArray[0].surname); fscanf(fp, ... |
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Code: #include int testmkr(); main() { printf("Hello, would you like to make a test or take one.\n\ \npress '1' to make a test\nor '2' to take a test"); if(getch() == '1') { system("cls"); printf("Loading test maker..."); testmkr(); } } testmkr() { char title[200]; FILE *tfile = NULL; char buf[BUFSIZ]; char *titlefile; system("cls"); printf("...Loading complete"); system("cls"); puts("\n\nEnter title of test: "); ... |
I'm trying to get this code to print from a file data.txt which is in my c folder... it's compiling without errors or warnings, anyone see what could be wrong? As soon as I run the program prints nothing and closes (return 0). Doesn't even show me the menu I made. Code: /* My name is Jack Trocinski */ #include ... |
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Hello to everybody. I have this simulation that implements some physical system. I get my results on a file using function fprintf. It-s a long Montecarlo simulation that gets one result in about half an hour. I have to collect much results and I write them on the same file. My problem is: the file seem to get an update only ... |
Hi guys! I am working on another assignment and I need your help. I am having trouble printing a \n every ten characters in the output file and also at the end of the output file. The reason you see all of those include files is because that this is a multi-file project. Code: #include #include #include "proto.h" #include ... |
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Hi all, I'm writing information in a .bin and I want to print it back onto the screen. I think the writing works pretty fine, but when I try to print....weird characters appear...I have no compile errors and I don't know how to solve this. There are only 3 highscores. They get sorted by a qsort function, but I don't know ... |
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32. Print to file cboard.cprogramming.com#include #include FILE *fptr; main() { int age = 22; /* Simple variables to write */ float salary = 19670.50; fptr = fopen("C:\WINDOWS\DESKTOP\BT\MYDATA.TXT", "w"); /* Opens for output */ if (fptr == 0) { printf("An error occurred while opening the file.\n"); exit (1); } fprintf(fptr, "Here is some stuff:\n"); fprintf(fptr, "I am %d years old.\n", age); fprintf(fptr, "I make ... |
I have four pre-interview problems to work through; this is likely the one that I will have to implement for tomorrow morning. This is seemingly an easy problem for seasoned C programmers, but albeit an elusive problem for me (I'm not verse in C by any standard).T My program must do the following: 1. read in data (non-formatted) from two text ... |
I am having trouble bring information from a file into a structure and printing it out on the screen. How is that done? Here is the code I have that has the structure and the open statement. But not sure how to pull the data from the file and print it out.. Is that a plain printf statement? Code: #include ... |
> This project is due at 11pm CST tonight Try www.cprog-tardis.com or www.cprog-miracles.com then. Quite what you expect anyone else to do about it with about 4 hours to go is beyond me. Maybe a course in basic time managment would be a good idea, because if you can't manage that, coding is not for you. > * You MUST use ... |
well if you just can get the putpixel function working from some API you can some what print the BMP on the screen..(even console screen)... but for JPEG or anything else you will require API's that deal with that specific format.. The reason being that BMP is not compressed and you can pretty much directly read the RGB values where as ... |
The following peice of code should open the printerDevice (defined as LPT1), open my customers file and then the printer should print the contents. The code compiles and gets to the line containing "printf("File opened");" but then doesnt seem to do anything. Any ideas people?? Thanks Code: { FILE *printer = fopen(printerDevice, "w"); FILE *fp; if ((fp = fopen ("customers", "rb" ... |
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I wrote part of a bigger program and it has a few problems: 1. double prints the menu. 2. where the user has to print y to continue it prints the Q but automaticaly continues. I don't know why. Code: #include #include #include void New_Item(int); void main(){ char date[9]; FILE *it; FILE *his; char choice; char user_name[20]; printf("please ... |
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Okay... whoops... It wasn't _that_ simple but I had indeed just done a stupid mistake. Next question I have an input file containing 28 words (one per line). We are supposed to assume that the file is too big to fit into memory and only read in half the file at a time. I can now perfectly read in half the ... |
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hello i am new to forum and c. i have an exercise and i would like some help.( I am student) and i am having trouble and i cant save the records to file where i want so i can retrieve them. here is my code pls help me. i have to get the exercise ready until tomorrow morning. PLEASE w8 ... |
i get the problem now, i put the file pointer in the fscanf f part, and it compiles fine. The post about fgets however i am unsure about, i have never used #define, so not sure how to define the buffer size. fgets aside, if i am using fscanf i get a memory error when i am running the program, and ... |
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"r" means "read" (leer). Use it to input from a file. "w" means "write" (escribir). Use it to output to a file, as with fprintf(). Also, the '\' is an "escape character", which means that it marks the character that follows it as something special; eg, '\n' is newline, '\t' is tab. The escape sequence for the '\' is '\\'. So ... |
What this program does is allows you to enter the filename at the command prompt for the file that will be used to read information from, in additon to allowing you to enter the filename at the command prompt for a file that will write information to. THe only problem I am incountering is only reading in one line when there ... |
Here's one problem, in get_info: scanf("%s", &filename); You need to remove the '&' from 'filename' as it's already a pointer. EDIT: It appears to run as intended, with that correction. If you plan to read and write random numbers, you'll want to open the file in binary mode rather than text mode (the default). In text mode on some systems, the ... |
Hello, I've got an ADT class written that contains exception handlers. What I need to do is print exception messages to an output file instead of to the screen. The only way I can think of to do this is to pass an ofstream reference to each function via main; however, the class currently has more than 30 functions, so I'm ... |
I am writing a program for my fathers company that takes AutoCAD plot files and sends them to the printer of their choice. I created a sort of "Windows Explorer" look where they can choose files that then go into a queue and are printed. I'm new to C# but have a lot of experience in Java and C++ so the ... |
#include #include #include char names[20][60]; int i, j; char name; void main(void) { FILE *in, *out; /* access to in.txt files */ printf("This program will read in names from the \nfile names.txt and print out to trans.txt.\n"); in = fopen("c:\\names.txt", "r"); out = fopen("c:\\trans.txt", "w"); for (i=0; i<20; i++) for(i=0;i<60;i++) names[i][j]=' '; for (i=0;i<20; i++) { fgets(&names[i][j], sizeof ... |
Good day, I am a freshmen student in need of some help. I have created an ATM program. This program has text files created for the withdraw transaction, deposit etc. It is like a database program for me. First of all, I would like to know how to compare strings and search within the text file the account number of a ... |
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/* * open_file.c * trying to create a file. * */ #include #define FILE_NAME "C:\\progdir\\openf\\text.txt" void end_it() { printf("\nProgram ended. Press enter to exit: "); fflush(stdin); /* workes with this compiler */ getchar(); } int main(void) { FILE *file_ptr; /* structure pointer */ atexit(end_it); /* call end_it at anytime it exit */ file_ptr = fopen(FILE_NAME, "w"); if(file_ptr == NULL) { ... |
#include #include #include #include #include #define MINMASS (0.0000515053396) #define pi (3.14159265) #define JUPVOL (6.98509E9 * 6.98509E9 * 6.98509E9 * (4.00/3.00) * pi) #define SOLM2G (1.98892E33) using namespace std; int main () { double j1, j2, j3, j4; ofstream file; file.open("big.in"); //open a file srand ( time(NULL) ); srand48(time(NULL)); j1 = drand48() * 0.013365; //mass needs to ... |
I have a program for a 5-way sort merge. I can get the program to read from the original file of 1,000,000 records and write them to 5 tempoary files (File0 thru File4). Then, I am suppose to close the temp files (Files 0 - 4) and open them as input, and open 5 more temp files (File 5 thru File ... |
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