#include <stdio.h>
int fn(int a, int n);
int SumA(int a, int n);
int main()
{
int a, n;
scanf("%d %d", &a, &n);
printf("fn(%d, %d) = %d\n", a, n, fn(a, n));
printf("s = %d\n", SumA(a, n));
return 0;
}
int fn(int a, int n)
{
int i, ret;
ret = 0;
for (i = 0; i < n; i++)
ret = ret * 10 + a;
return ret;
}
int SumA(int a, int n)
{
int i, sum;
sum = 0;
for (i = 1; i <= n; i++)
sum += fn(a, i);
return sum;
}
浙大版《C语言程序设计(第3版)》题目集 习题6-2 使用函数求特殊a串数列和 (20分)
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