循环 while   do---while

1 计算1+2+3...+99+100的和. a--- int sum = 0,i = 0; while (i < 101) { sum = sum + i; i++; } printf("%d",sum);b-- int sum = 0,i = 1;//存储值 do { sum = sum + i;//现执行一次循环体,在判断条件 i++; } while (i < 101); printf("%d",sum);

2
//100以内13倍数之和 int sum = 0,i = 1; while (i < 101) { if (i % 13 == 0) {//对13取余 printf("%d",i); sum = sum + i; } i++; } printf("\n%d",sum);

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