求Sn=a+aa+aaa+aaaa+aaaaa的前5項之和，其中a是一個數字.

#define _CRT_SECURE_NO_WARNINGS #include<stdio.h> #include<stdlib.h> int main(){ int i, j; int sum = 0; scanf("%d", &i); int sum1=0; for (j = 1; j <= 5; j++) { sum1 = sum1 + i; sum = sum + s

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