题解 | #KiKi设计类继承#

#include <stdio.h>
#define pi 3.14

#include<stdio.h>
struct shap {
    int x;
    int y;
};

struct un {
    struct shap m;
    int r;
    int c;
};

int main() {
    struct un t = {0};
    scanf("%d %d", &t.m.x, &t.m.y);
    scanf("%d", &t.r);
    scanf("%d", &t.c);
    printf("%d\n", t.m.x * t.m.y);
    printf("%g\n", 3.14 * t.r* t.r);
    printf("%d\n", t.c * t.c);
    return 0;
}