c语言怎么删除字符串中相同字符

#include<stdio.h>

#include<string.h>

#define     MAX   100

int main()

{

    char str[MAX];

    char c;

    int strlen = 0;

    int i,j,k;

    scanf("%s",&str);//连续输入字符串

    for(i = 0;str[i] != '\0';i++);

    strlen = i;

    for(i = 0;i <= strlen - 1;i ++)

    {

        for(j = i + 1;j <= strlen - 1;j ++)

        {

            if(str[i] == str[j])

            {

                 for(k = j;k <= strlen - 1;k ++)

                 {

                    str[k]=str[k + 1];

                 }

                 strlen --;

                 j --;//避免出现多个相同字符连在一起时出错的问题

            }

        }

    }

    str[strlen] = '\0';

    printf("%s",&str);

    return 0;

}