在Mac OS X下等效的_wfopen

#include<stdio.h>

int main() {
    FILE *file;
    file = fopen("example.txt", "w");
    if (file == NULL) {
        printf("Error opening file!\n");
        return 1;
    }
    fprintf(file, "This is a test.\n");
    fclose(file);
    return 0;
}