头文件
#include#include #include #pragma once
代码文件
#include "myH.h"//深度理解递归与迭代方法//递归与迭代方法的区别：//递归使用函数和条件语句(if和else语句)//迭代法使用循环语句(for和while语句)/************************************************************************程序目标:一.求和 二.求阶乘 三.分别利用递归和迭代法实现************************************************************************///求和int fooSum(int n){ if (n < 0) { return -1; } if (n == 1) { return n; } else return n +fooSum(n-1);}int fooSum02(int n){ int i = 0; int sum = 0; if (n < 0) { return -1; } for (i=1;i<=n;i++) { sum += i; } return sum;}int main01(){ int ret = 0; int n = 0; int sum = 0; printf("测试阶乘:"); scanf("%d",&n); sum = fooSum(n); sum = fooSum02(n); if (sum == -1) { printf("error:%d",sum); return ret = sum; } printf("输出的结果是:%d",sum); system("pause"); return ret;}//求阶乘int fooMul(int n){ if (n < 1) { return -1; } if (n == 1) { return n; } else { return n*fooMul(n-1); }}int fooMul02(int n){ int i = 0; int sum = 1; if (n < 1) { return -1; } for (i = 1;i <= n;i++) { sum *=i; } return sum ;}int main(){ int ret = 0; int sum = 0; int n = 0; printf("测试用例:"); scanf("%d",&n); sum = fooMul(n); sum = fooMul02(n); if (sum == -1) { printf("error:%d",sum); return ret = sum; } printf("结果是：%d",sum); system("pause"); return ret;}