Example of fopen function C language

/*
Example: fopen in C language
*/

#include <stdio.h>
#include <stdlib.h>

#include <stdio.h>
#include <stdlib.h>

int main () {
   FILE * fp;

   fp = fopen ("file.txt", "w+"); // Open file in write mode
   fprintf(fp, "%s %s %s %d", "We", "are", "in", 2017); // write data
   
   fclose(fp); //  close the file  
   
   return(0);
}