my_strstr

#include <stdio.h>
#include <stdlib.h>

int strlength(const char chaine[])
{
    int length = 0;
    char c;
    do
    {
        c = chaine[length];
        length++;
    }
    while(c != '\0');
    length--;
    return length;
}

const char* strstr(const char chaine[], const char* search)
{
    int strlen = 0;
    char ch;
    int length = strlength(search);
    char* str = NULL;
    do
    {
        int strlen2 = 0;
        int c = 0;
        char ch2;
        ch = chaine[strlen];
        printf("%c\n", ch);
        strlen++;
        do
        {
            ch2 = search[strlen2];
            if(chaine[strlen] == search[strlen2])
            {
                c++;
                strlen++;
                printf("%c\n", ch2);
                if(c == length)
                {
                    str = &chaine[strlen-length];
                }
            }

            strlen2++;
        }
        while(ch2 != '\0');
    }
    while (ch != '\0');
    return str;

}

int main()
{
    char chaine[100] = "start a new sentence.";
    char chaine2[100] = "i am starting this new sentence.";
    const char *suite = NULL;

    suite = strstr(chaine2, "sent");
    printf("here is the sentence starting from the found string : %s", suite);
    return 0;
}