space removal

#include <stdio.h>

int main()
{
    FILE *f1, *f2;
    f1=fopen("in.txt", "r");
    f2=fopen("out.txt", "w");

    int f=0;
    char c;
    while((c=fgetc(f1))!=EOF){
        if(c==' '){
            if(f==0){
                fputc(c,f2);
                f=1;
            }
        }
        else{
            f=0;
            fputc(c,f2);
        }
    }

    fprintf(f2,"\n");

    return 0;
}