C语言中do是什么意思
时间: 2023-08-02 12:06:57 浏览: 183
在C语言中,do是一种循环结构,也称为do-while循环。它的基本语法为:
```c
do {
// 循环体语句
} while (循环条件);
```
do-while循环先执行循环体中的语句,然后再检查循环条件是否成立。如果循环条件成立,则继续执行循环体中的语句,直到循环条件不成立为止。与while循环不同的是,do-while循环保证循环体中的语句至少会被执行一次。
例如,下面的代码使用do-while循环计算1到10的累加和:
```c
int sum = 0;
int i = 1;
do {
sum += i;
i++;
} while (i <= 10);
printf("1到10的累加和为:%d\n", sum);
```
上述代码中,循环体中的语句用于计算1到10的累加和,do-while循环保证循环体中的语句至少会被执行一次,即先执行sum += i语句,再检查i <= 10是否成立。如果成立,则继续执行循环体中的语句,直到i > 10为止。最后输出计算得到的累加和。
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