1018: [编程入门]有规律的数列求和

解题思路:

注意事项:

参考代码:

#include<stdio.h>

int main() {

float a[8] = { 0,0,2,1,1,1,0,0 };

scanf_s("%f", &a[0]);

for (; a[0] != 0; a[0]--) {

a[1] += a[2] / a[3];

a[6] = a[2];

a[7] = a[3];

a[2] += a[4];

a[3] += a[5];

a[4] = a[6];

a[5] = a[7];

}

printf("%0.2f", a[1]);

}