题解 | KiKi设计类继承

#include <stdio.h>

int main() {
    int w,d,r,z;
    scanf("%d %d %d %d",&w,&d,&r,&z);
    printf("%d\n",w*d);
    if ((float)(3.14*r*r) == (int)(3.14*r*r) ) {
        printf("%d\n",(int)(3.14*r*r));
    }
    else if((int)(((float)(3.14*r*r)-(int)(3.14*r*r))*100) % 10 == 0){
        printf("%.1f\n",(float)(3.14*r*r));
    }
    else {
        printf("%.2f\n",(float)(3.14*r*r));
    }
    printf("%d",z*z);
    return 0;
}