例如:2+22+222+2222+22222
#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <stdlib.h>
int main()
{
int i, n = 0, tmp = 0, sum = 0;
printf("请输入一个数:");
scanf("%d", &n);
for (i = 0; i < 5; i++)
{
tmp = tmp * 10 + n;//主要思想
sum += tmp;
}
printf("计算结果为%d\n", sum);
system("pause");
return 0;
}