实验11-1-6 指定位置输出字符串

#include <stdio.h>

#define MAXS 10

char* match(char* s, char ch1, char ch2);

int main()
{
    char str[MAXS], ch_start, ch_end, * p;

    scanf("%s
", str, MAXS);
    scanf("%c %c", &ch_start, &ch_end);
    p = match(str, ch_start, ch_end);
    printf("%s
", p);

    return 0;
}

/* 你的代码将被嵌在这里 */
char* match(char* s, char ch1, char ch2)
{
    char *p, *q, *r;
    char temp[MAXS];
    int i;
    
    //查找ch1的位置，找到p就是位置指针，找不到p指针指向结束符 
    p = s;
    while (*p != '')
    {
        if (*p == ch1) 
        {
            break;
        }
        p++;
    }
    
    //查找ch2的位置，从P位置开始查找 
    //找到q就是位置指针，找不到q指向结束符 
    q = p;
    if (*p != '')
    {
        
        while (*q != '')
        {
            if (*q == ch2)
            {
                break;
            }
            q++;
        }
    }
    
    i = 0;
    for (r = p; r <= q; r++)
    {
        temp[i] = *r;
        i++;
    }
    temp[i] = '';
    
    printf("%s
", temp);
    
    return p;    
}