[C++知识库]C语言指针学习

查找匹配的字符

语言指针学习

C和指针6_1

#include<stdio.h>
//指针练习查找匹配的字符
char *find_char(char const *source,char const *chars)
{
    char *p2=chars;
    if(!source||!chars)
    {
        return NULL;
    }
    else
    {
        while(*p2!='\0')
        {
            for(char *p1=source;*p1!='\0';p1++)
            {
                if(*p1==*p2)
                {
                    return p1;
                }
            }
            p2++;
        }
        return NULL;
    }
}

int main(void)
{
    //用数组表示字符串需要给出结束标志'\0'
    char test1[]={'A','B','C','D','E','\0'};
    char test2[]={'X','R','C','D','Y','Z','\0'};
    char *pe=find_char(test1,test2);
    if(pe)
    {
        printf("%c\n",*pe);
    }
    else
    {
        printf("未找到\n");
    }
    return 0;
}