#include <stdio.h>
#include <stdlib.h>

/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int main(int argc, char *argv[]) {
    int r,V;
    scanf("r",&r);
    V=4/3* PI*r*r*r;
    printf("半径为%d的球的体积位%d",V);
    return 0;
}

#include <stdio.h>
#include <stdlib.h>

/* run this program using the console pauser or add your own getch, system("pause") or input loop */
#define PI 3
int main(int argc, char *argv[]) {
    int r, V;
    scanf("%d", &r);            //scanf同printf，用%d获取整数
    V = 4 / 3 * PI*r*r*r;            //PI没定义
    printf("半径为%d的球的体积位%d", r,V);//printf的两个%d要对应两个参数
    return 0;
}