從鍵盤輸入父串，子串，要求刪除父串中的子串。

如：
父串：“hellosdhellodsfhellohello”
子串：“hello”
要求刪除父串中的hello。

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

#define MAX_SIZE 1024

int my_strncmp(char *s1, char *s2, int len)
{
    int i;

    for(i = 0; i < len; i++)
    {
        if(*(s1 + i) != *(s2 + i))
        {
            return -1;
        }
    }

    return 0;
}

char *delete_aim_str(char *src, char *delete)
{
    int i;
    int d_len = strlen(delete);
    int s_len = strlen(src);

    char *dest = src;

    while(*src != '\0')
    {
        if(my_strncmp(src,delete,d_len) == 0)
        {
            for(i = 0; i < s_len - d_len; i++)
            {
                *(src+i) = *(src + d_len+i);
            }
        }
        src++;
    }
    return dest;
}

int main()
{
    char src[MAX_SIZE];
    char delete[MAX_SIZE];

    printf("Please input string src:\n");
    scanf("%s",src);

    printf("Please input string to be deleted:\n");
    scanf("%s",delete);

    char *result = delete_aim_str(src,delete);

    printf("The result is:\n%s\n",result);

    return 0;
}