How to create char[][] from txt file in C? - c

Question

I am pretty new to C and I have got a problem here in C:
I want to write a program which reads a txt file and writes the content it a char[50][50].
To read the file I used fopen but I have no idea how to write this into the array. What is a good way to solve this?

Answer 1

Easy to use fread if it only read from a file the size of the specific.
E.g.
#include <stdio.h>
#include <stdlib.h>
int main() {
FILE *fp;
char data[50][50];
int count;
if(NULL==(fp=fopen("data.txt","r"))){
perror("file not open\n");
exit(EXIT_FAILURE);
}
count=fread(&data[0][0], sizeof(char), 50*50, fp);
fclose(fp);
{ //input check
int i;
char *p = &data[0][0];
for(i=0;i<count;++i)
putchar(*p++);
}
return 0;
}

Answer 2

EDIT: #BLUEPIXY's answer is significantly better than this approach.
#Hidde's code adapted for this specific example:
// Include the standard input / output files.
// We'll need these for opening our file
#include <stdio.h>
int main ()
{
// A pointer to point to the memory containing the file data:
FILE * pFile;
// Open the file itself:
pFile=fopen ("250.txt","r");
// Check that we opened the file successfully:
if (pFile==NULL)
{
perror ("Error opening file");
}
else
{
// The file is open so we can read its contents.
// Lets just assume its got 50*50=250 chars in.
// Initialise an array to hold our results:
char array[50][50];
int row, col;
for (row = 0; row < 50; row++)
{
for (col = 0; col < 50; col++)
{
// Store the next char from our file in our array:
array[row][col] = fgetc (pFile);
}
}
// Close the file
fclose (pFile);
// Demonstrate that we've succeeded:
for (row = 0; row < 50; row++)
{
for (col = 0; col < 50; col++)
{
printf("%c", array[row][col]);
}
printf("\n");
}
}
// Return 0 indictaes success
return 0;
}
Really there should be some code to check that the input file meets your expectations, otherwise strange things may happen.

Answer 3

/* fgetc example: money counter */
#include <stdio.h>
int main ()
{
FILE * pFile;
int c;
int n = 0;
pFile=fopen ("myfile.txt","r");
if (pFile==NULL) perror ("Error opening file");
else
{
do {
c = fgetc (pFile);
if (c == '$') n++;
} while (c != EOF);
fclose (pFile);
printf ("The file contains %d dollar sign characters ($).\n",n);
}
return 0;
}
Copied from CPlusPlus.com. You can read the file using fgetc(FILE* ). You make a while loop, in which you test if the last character read is not the end of the file. I hope you can fill your array with this code.