思想太简单了:就不说了,如有不会可加小凯QQ:991554637,大家可以一起学习!代码如下:
double SolveSumSub(int end) { int i = 0; double sum_sub = 0; for (i = 1; i <= end; i++) { int tmp = 0; if (i % 2 == 0) { tmp = -i; } else { tmp = i; } sum_sub += 1.0 / tmp; } return sum_sub; } int main() { double sum_sub = 0; int end = 0; scanf("%d", &end); sum_sub = SolveSumSub(end); printf("%f\n", sum_sub); return 0; }