采用switch语句修改“4.2.2 continue 语句”对应的
【例4.9】。
要求:将例子中确定本次猜拳输赢的判断语句,用switch语句进行改写。
#include <iostream>
using namespace std;
int main() {
int player;
int computer;
cout << "石头剪刀布游戏开始!" << endl;
cout << "请玩家输入选择(石头-1,剪刀-2,布-3):" << endl;
cin >> player;
computer = rand() % 3 + 1; // 生成1到3之间的随机数
cout << "电脑选择了:" << computer << endl;
switch (player) {
case 1:
switch (computer) {
case 1:
cout << "平局" << endl;
break;
case 2:
cout << "玩家赢了" << endl;
break;
case 3:
cout << "电脑赢了" << endl;
break;
}
break;
case 2:
switch (computer) {
case 1:
cout << "电脑赢了" << endl;
break;
case 2:
cout << "平局" << endl;
break;
case 3:
cout << "玩家赢了" << endl;
break;
}
break;
case 3:
switch (computer) {
case 1:
cout << "玩家赢了" << endl;
break;
case 2:
cout << "电脑赢了" << endl;
break;
case 3:
cout << "平局" << endl;
break;
}
break;
default:
cout << "无效的选择" << endl;
break;
}
return 0;
}
# include <stdio.h>
int main(void)
{
double value1, value2;
char operator1;
printf("Type in an expression: "); /* 提示输入一个表达式 */
scanf("%lf%c%lf", &value1, &operator1, &value2);
switch(operator1){
case '+':
printf("=%.2f\n", value1 + value2);
break;
case '-':
printf("=%.2f\n", value1 - value2);
break;
case '*':
printf("=%.2f\n", value1 * value2);
break;
case '/':
printf("=%.2f\n", value1 / value2);
break;
default:
printf("Unknown operator\n");
break;
}
return 0;
}