C语言实现求2!+4!+6!+8!+10!之和

#include "stdio.h"

float factorial(int n) { float result = 1.0; for (int i = 1; i <= n; i++) { result *= i; } return result; }

float sum(int n) { float s = 0; for (int i = 2; i <= n; i += 2) { s += factorial(i); } return s; }

int main() { printf("sum=%f\n", sum(10)); return 0; }