编辑代码

#include <stdio.h>
int main () {
    int f1=1,f2=1,fn=0;
    for(int n =3;n<=12;n++){
        fn = f1+f2;
        f1 = f2;
        f2 = fn;
        printf("fn=%d,",fn);
    }
	return 0;
}