44.字符串删除指定字符或者字符串

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

//字符串中删除某一个字符
void deletech(char *str,char ch)
{
    if (str == NULL)
    {
        return;
    }

    char *pstr = str;
    while (*str != '')
    {
        if (*str != ch)
        {
            *pstr++ = *str++;
        }
        else
        {
            str++;
        }
    }
    *pstr = 0;
}

//字符串中删除某一个字符串
void deletestr(char *str, char *des)
{
    char *find = strstr(str, des);
    while (find != NULL)
    {
        int len = strlen(des);
        
        //从find开始到结尾的长度
        for (int i = 0; i <= strlen(find) - len; i++)
        {
            //替换,加长度则下标到该字符串的后一位
            *(find + i) = *(find + len + i);
        }

        //
        find = strstr(find + 1, des);
    }
}

void main()
{
    char str[100] = "i love you i love her i love china i love my family";

    printf("%s
", str);
    //deletech(str,'i');
    deletestr(str, "love");
    printf("%s
", str);
    system("pause");
}