輸入樣例
1
2
3
2.4 3
0
輸出樣例
1-Ball
2-Cylinder
3-Cone
other-Exit
Please enter your command:
Please enter the radius:
33.51
1-Ball
2-Cylinder
3-Cone
other-Exit
Please enter your command:
Please enter the radius and the height:
18.10
1-Ball
2-Cylinder
3-Cone
other-Exit
Please enter your command:

#include<stdio.h> double Cone(double r,double h); double Cylinder(double r,double h); double ball(double r); void print(); int main(){int a,cnt=0;double r,h;while(1){print();scanf("%d",&a);if(a==1){printf("Please enter the radius:\n");scanf("%lf",&r);ball(r);}else if(a==2){printf("Please enter the radius and the height:\n");scanf("%lf %lf",&r,&h);Cylinder(r,h);}else if(a==3){printf("Please enter the radius and the height:\n");scanf("%lf %lf",&r,&h);Cone(r,h);}else{break;}} } void print(){printf("1-Ball\n");printf("2-Cylinder\n");printf("3-Cone\n");printf("other-Exit\n");printf("Please enter your command:\n"); } double ball(double r){double v;v=4.0/3.0*3.1415926535*r*r*r;printf("%.2f\n",v); } double Cylinder(double r,double h){double v;v=3.1415926535*r*r*h;printf("%.2f\n",v); } double Cone(double r,double h){double v;v=(3.1415926535*r*r*h)/3.0;printf("%.2f\n",v); }

可以直接主函數操作就行，這里是練習以下調用函數
自己的注意點
pi的精度3.1415926535，否則差4分的測試點，卡了好久
類型和變量一定一定要匹配對應，比如我的定義輸入的是int型，運行輸入時是double的數字，就出現瘋狂死循環，我還在找是不是while出錯了

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