字符串逆转

头文件:

1 #include<stdlib.h>
2 #include<stdio.h>
3 #include<string.h>

1、函数原型:

void inverse(char *str);

方法一:

void inverse(char *str){
    char *p1, *p2;

    char temp;

    p1 = str;
    p2 = str + strlen(str) - 1; 

    while(p1 < p2){
        temp = *p1;
        *p1 = *p2;
        *p2 = temp;
        p1++;
        p2--;
    }

}

方法二:

 1 void inverse(char *str){
 2     int i, j, temp;
 3 
 4     i = 0;
 5     j = strlen(str) - 1;
 6 
 7     while (i < j){
 8         temp = str[i];
 9         str[i] = str[j];
10         str[j] = temp;
11         i++;
12         --j;
13     }
14     
15 }

2、函数原型:

void inverse(char *str,char * str2);

 方法:

void inverse(char *str,char * str2){

    
    if(str == NULL)
        return;

    if(*str == '\0')
        return ;

    inverse(str + 1, str2);

    strncat(str2, str, 1);
}

 

 

 

转载于:https://www.cnblogs.com/zhouquan-1992-04-06/p/6201123.html