Unable to create output file

Answer 1

What have you tried? And it probably won't work in the Solo playground.

Answer 2

size_t fwrite(const void *restrict ptr, size_t size, size_t nitems,
FILE *restrict stream);

Here is the signature to write to a file.

#include<stdio.h>

int main () {
FILE *fp;
char str[] = "Write this to file.";

fp = fopen( "file.txt" , "w" );
fwrite(str , 1 , sizeof(str) , fp );

fclose(fp);

return(0);
}

This is the basic open file and write to it example.