Question

从键盘输入一个字符串，使其反序存放，在主函数中输入、输出该字符，编写一个函数

Answer 1

#include "stdafx.h"
#include "stdio.h"//
#include "string.h"
char *RevStr(char *pStr){
return strrev(pStr);
}

void main(void){/*主程序*/
char a[120];
printf("请输入一个字符串!\n原串是:");
gets(a);
printf("反转后:%s\n",RevStr(a));
}

Answer 2

#include<stdio.h>
#include<string.h>
#include<stdlib.h>
char *reverseString(char *str)
{
char *h, *t;
char mid;
int i = 0;
h = str;
t = str;
while(*t != '\0')
{
t++;
}
t = t-1;

while(1)
{
if(h >= t)
{
break;
}
mid = *h;
*h = *t;
*t = mid;
h++;
t--;
}
return str;
}

void main()
{
char str[100];
printf("请输入要处理点字符串:");
gets(str);
printf("原始字符串为:%s\n",str);
printf("翻转字符串为:%s\n",reverseString(str));
}

Answer 3

void reverse(char *s)
{
char temp;
int count = 0;
while(s[count] != '\0')
count++;
count--;
for (int i = 0; i <= count/2; i++){
temp = s[i];
s[i] = s[count-i];
s[count-i] = temp;
}
s[++count] = '\0';
}

int main()
{
char s[100];
scanf("%s", &s);
reverse(s);
puts(s);

return 0;
}