Thread: Want to fill a string with text in a file, passing it as parameter to a function

Hi all, i'm trying to make a little program that with a function you can read a file, and get a string (in this case "pStrTrama") fill with the file content. What i see in the debugger is that the string pStr of the function, get fill successfully but it doesn't change the variable "pStrTrama" in main.

¿What am i doing wrong?

Code:

/*Libraries*/
#include <stdio.h>
#include <process.h>
#include <string.h>
#include <malloc.h>


void getStrFile(char*, FILE*, char*);


int main()
{
    char *pStrTrama = NULL;
    FILE *source = NULL;


    getStrFile(pStrTrama, source, "IDELCLTSDO_180_IATX.txt");


    printf("%s", pStrTrama);


    system("PAUSE");
    return(0);
}


void getStrFile(char *pStr, FILE *pFile, char *pFileName)
{
    int byte = 0;
    char ch;


    fopen_s(&pFile, pFileName, "r");
    if (pFile == NULL)
    {
        printf("Can't open source file...\n");
        exit(1);
    }


    while ((ch = fgetc(pFile)) != EOF)
        byte++;


    pStr = (char*)calloc(byte, sizeof(char));


    rewind(pFile);
    for (int x = 0;(ch = fgetc(pFile)) != EOF; x++)
    {
        pStr[x] = (int)ch;
        pStr[x + 1] = '\0';
    }


    fclose(pFile);
}

Thanks!

Code:

while ((ch = fgetc(pFile)) != EOF)
        byte++;

You could replace this loop with a call to "fseek()", seeking to the end of the file, then using "ftell()" to return the last position in the file, the size of the file. Or you could use "fstat()".