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

#define _IRON_TRUE 1
#define _IRON_FALSE 0

typedef int BOOL;

int strStr(char* s1, char* s2)
{
        ;
        int l1 = strlen(s1);
        int l2 = strlen(s2);

        ) ;

        ;

        , j = ;
        ; i <= (l1-l2); i++)
        {
                BOOL successFlag = _IRON_FALSE;
                ; j < l2; j++)
                {
                        if(*(s1+i+j) != *(s2+j))
                        {
                                successFlag = _IRON_FALSE;
                                break;
                        }

                        successFlag = _IRON_TRUE;
                }

                if(successFlag) return i;
        }

        ;
}

int main(int argc, char* argv[])
{
        )
        {
                printf("please input two str param, the first is haystack and the second is needle\n");
        }
        ];
        ];

        int i = strStr(s1,s2);
        printf("%d",i);
}