[C Language] enter multiple lines of information on the terminal to find the lines containing the "ocould" and print and modify the lines.

[C Language] enter multiple lines of information on the terminal to find the lines containing the "ocould" and print and modify the lines.

#define _CRT_SECURE_NO_WARNINGS 1#include<stdio.h>#include<assert.h>#include<stdlib.h>#define MAX 1000 char *my_strstr(const char *dst,const  char *src){    assert(dst);    assert(src);    char *p = dst;    char *s1 = p;    char *s2 = src;    while (*s1)    {        s1 = p;        s2 = src;        while ((*s1!='\0')&&(*s2 != '\0'))        {            if (*s1++ == *s2++)            {                ;            }            else            {                    p++;                break;            }        }        if (*s2 == '\0')        {            return p;        }    }    return NULL;}int getline(char *line, int limit){    assert(line);    char ch = 0;    int i = 0;    while (limit-- && ((ch = getchar()) != EOF) && ch != '\n')    {        line[i++] = ch;    }    if (ch == '\n')    {        line[i++] = '\n';    }    line[i] = '\0';    return i;}int main(){    /*char *str1 = "abbbcdef";    char *str2 = "bbcd";    char *ret = my_strstr(str1, str2);    printf("%s\n", ret);*/    char *str1 = "ould";    char line[MAX] = { 0 };    while (getline(line, MAX - 1))    {        if (my_strstr(line, str1))        {            printf("%s\n", line);        }    }    system("pause");    return 0;}