implicit declaration of function 'printf' is invalid in C99

[john124]

I am running Mac OS X Ver. 10.7.5 and when I try to compile this simple program I get this error when I try to fprint to the file:

implicit declaration of function 'printf' is invalid in C99

#include <stdio.h>

int main()
{
    FILE *myfile;
    
    myfile = fopen("alive.txt", "w");
    if(!myfile)
    {
        puts("Some kind of file error!");
        return(1);
    }
    
    fprint(myfile, "I created a file! It's alive!\n");
    
    fclose(myfile);
 
    return 0;
}

[weaknessforcats]

I think you meant to code fprintf rather than fprint.

You must use function prototypes in C99 and the compier coulldn't find one for fprint so it guessed you were using the old-style C method of declaring functions.