- //1> 提示用户输入一个正整数n,计算1+2+3+…+n的和
- #include <stdio.h>
- int main()
- {
- //1、提示输入正整数
- //2、接收输入数值
- int n =0;
-
- while (n<=0){
-
- printf("请输入一个正整数:\n");
- scanf("%d",&n);
- }
- //3、计算和
- //定义变量保存和
- int sum = 0;
- int number = 0;
-
- while (number<n ) {
- number++;
- sum+=number;
- }
- printf("%d\n",sum);
-
- return 0;
- }
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