Functions

#include <stdio.h>

void cfile(char *file)
{
     FILE *fp = fopen(file, "w");
     fprintf(fp, "example");
     fclose(fp);
}

int add(int x, int y)
{
     int r;
     r = x + y;
     return(r);
}

int main()
{
     cfile("example.txt");
     add(1,1);
     return 0;
}