Question

I am writing code to read and write a text file. But when I run my code, I’m getting a SIGSEGV run-time error. I need help figuring out what is wrong with the code.

#include <stdio.h>
#include <stdlib.h>
int main(){
    /*Variable for writing to file */
    char *name[] = {"Raju", "Nayan", "Hanif"};
    char *id[] = {"100", "101", "102"};
    float cgpa[] = {3.50, 5.00, 4.00};
    /*Variable for reading from file*/
    char *getname, *getid;
    float getcgpa;
    int i;
    FILE *fp;
    fp = fopen("f:\\raju.nog", "w"); /*Create new file */
    for(i=0; i<5; i++){
        fprintf(fp, "%-10s%-10s%-1.2f\n", name[i], id[i], cgpa[i]); /*write to file*/
    }
    fclose(fp);
    /*read from file and print to screen*/
    fp = fopen("f:\\raju.nog", "r");
    while(fscanf(fp, "%s %s %f", &getname, &getid, &getcgpa) != EOF){
        printf("%-10s%-10s%-1.2f\n", getname, getid, getcgpa);
    }

    system("PAUSE");
}

Answer 1

The arrays:

char *name[] = {"Raju", "Nayan", "Hanif"};
char *id[] = {"100", "101", "102"};
float cgpa[] = {3.50, 5.00, 4.00};

declare 3 elements but

for(i=0; i<5; i++){
    fprintf(fp, "%-10s%-10s%-1.2f\n", name[i], id[i], cgpa[i]); /*write to file*/
}

is trying to iterate over 5, thus overrunning the bounds of the arrays.