C语言中如何避免连续的if...else if...else冗余?
时间: 2024-09-27 22:01:58 浏览: 64
在C语言中,当需要对一组可能的值进行判断时,连续的if...else if...else结构可能会显得冗长且难以维护。为了避免这种冗余,可以使用switch-case语句。switch-case结构更适用于有固定集合的情况,每个case代表一种可能的值。
例如,如果你想要替换之前的if-else判断,可以这样做:
```c
#include <stdio.h>
int main() {
int num;
printf("请输入一个整数:");
scanf("%d", &num);
switch (num) {
case 1:
printf("数字是1.\n");
break;
case 2:
case 3:
case 4:
case 8:
case 7:
case 9:
printf("数字是2、3、4、8、7或9之一.\n");
break;
default:
printf("数字不是1、2、3、4、8、7或9.\n");
break; // 可选,因为有些编译器会在最后一个case后自动添加default
}
return 0;
}
```
在这种情况下,每一个`case`块都对应一个可能的值,`break`关键字用于跳出当前`case`,`default`用于处理所有其他未匹配的值。这样使得代码更清晰,维护也更容易。
阅读全文
相关推荐


















