c语言递归实现 字符串/数组翻转

c语言递归实现 字符串/数组翻转

#include <stdio.h>
#include<string.h>
#include<stdlib.h>
/*****tonytrek*****2021.5.7*****/
/*****数组/字符串翻转*****/
void string_upside_down(int,int,char *,int);
int main()
{
    char* string=malloc(10);
    scanf("%s",string);
    int num1=0;
    int num2=strlen(string)-1;
    int rest=strlen(string);
    string_upside_down(num1,num2,string,rest);
    printf("%s\n",string);
    return 0;
}
void string_upside_down(int num1,int num2,char *str,int rest)
{
    char tmp;
    if(rest==1||rest==0)
    {
        return;
    }
    else
    {
        tmp =str[num1];
        str[num1]=str[num2];
        str[num2]=tmp;
        rest=rest-2;
        num1++;
        num2--;
        string_upside_down(num1,num2,str,rest);
    }
}