字符串逆转

头文件:

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

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 }