字符串操作

　　对给定字符串删除特定字符或者是特定字符串。对字符串操作一定要注意结束符'\0'的处理。

// StrDeleteChar.cpp : 定义控制台应用程序的入口点。
//

#include "stdafx.h"

void StrDeleteChar(char *str, char ch)
{//删除字符串str中的指定字符ch
    int i, j;
    for (i = 0,j = 0; str[i] != '\0'; i++)
    {
        if (str[i] != ch)
        {
            str[j++] = str[i];
        }
    }
    str[j] = '\0';
}

void StrDeleteWord(char *str, char *wd)
{//删除字符串中str中的指定单词wd
    int i,j,k;
    int len = strlen(wd);
    for (i=0,j=0,k=0; str[i] != '\0'; i++)
    {
        //字符不相等
        if (str[i] != wd[j])
        {
            str[k++] = str[i];
            j = 0;
        }
        else
        {
            while (str[i] == wd[j] && j < len)
            {
                i++;
                j++;
            }
            //匹配
            if (j == len)
            {
                //str[k] = str[i];
                j = 0;
                --i;
            }
            else   //不匹配
            {
                i = i- j;
                j = 0;
                str[k++] = str[i];
            }
        }
    }
    str[k] = '\0';
}

int _tmain(int argc, _TCHAR* argv[])
{
    char str[] = "I amtion a student, haha";
    StrDeleteChar(str, 'a');
    printf("After delete :%s\n", str);
    char str1[] = "Hello world,I amamam here am haha.";
    char wd[] = "am";
    StrDeleteWord(str1,wd);
    printf("After delete word: %s,the result is:%s\n",wd,str1);
    
    return 0;
}


2014/4/16 20:40