c语言-逆置字符串

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#include "stdio.h"#include "string.h"int main()   {        char s[]="张伟伟";        int len=strlen(s);        printf("%d\n",sizeof(s));        printf("%s\n",s);        int start=0;        int end=len-3;        char *p =&s[0];        char *p1=&s[len-3];        while(start<end)//uft8三个字节组成一个汉字，逆置时候就要考虑到这点        {           //下面代码 是1-7 2-8 3-9 进行交换                char tem=*p;                *p=*p1;                *p1=tem;                p++;                p1++;                tem=*p;                *p=*p1;                *p1=tem;                p++;                p1++;                tem=*p;                *p=*p1;                *p1=tem;                p++;                p1-=5;                start+=3;                end-=3;        }           printf("%s\n",s);}

以下是字符串逆置

#include "stdio.h"#include "stdlib.h"#include "string.h"#include "time.h"#include <sys/stat.h>void inverse(char *str)//字符串逆置{    char *p1 = str;    char *p2 = str + strlen(str) - 1;    while (p1 < p2)    {        char tmp = *p1;        *p1 = *p2;        *p2 = tmp;        p1++;        p2--;    }}int main(){    char buf[] = "abcdefg";    inverse(buf);    printf("buf=%s\n", buf);}

void inverse(char *str,int num)//字符串逆置指定逆直前几位{    char *p1 = str;    char *p2 = str + num - 1;    while (p1 < p2)    {        char tmp = *p1;        *p1 = *p2;        *p2 = tmp;        p1++;        p2--;    }}

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