How to create create a text files sequence in C

Question

I want to create text files sequence like...

student1.txt
student2.txt
student3.txt
...

How to do it?

I have a sample code, but its not working for my problem.

#include<stdio.h>

void main()
{
    FILE *fp;
    int index;

    for(index=1; index<4; index++)
    {
        fp=fopen("student[index].txt","w");
        fclose(fp);
    }
}

Answer 1

You are using aa fixed string "student[index].txt" rather than making a string with the number you want in it.

void main()
{
  FILE *fp;
  int index;
  char fname[100];

  for(index=1; index<4; index++)
  {
    sprintf(fname, "student%d.txt", index);
    fp=fopen(fname,"w");
    fclose(fp);
  }
}

Answer 2

You can't put variables inside of a string constant like that. You need to construct the string you want using sprintf :

for(index=1; index<4; index++)
{
    char name[20];
    sprintf(name, "student%d.txt", i);
    fp=fopen(name,"w");
    fclose(fp);
}