题解 1135: C语言训练-求s=a+aa+aaa+aaaa+aa...a的值（C）

参考代码:

#include<stdio.h>

int main(void){
	int i;
	int n,frequency;
	int num,sum;
	scanf("%d%d",&n,&frequency);
	sum = num = n;
	
	for(i=1;i<frequency;i++){
		num = n+num*10;                            //计算每个数字
		sum = sum+num;                            //对数字求和
		//printf("num=%lld sum=%lld\n",num,sum);
	}
	
	printf("%d",sum);
	
	return 0;
}