Implement strstr() to find a substring in a string

Write C code to implement the strstr (Search for a substring) function. Do not use any system library such as strlen.

C++:
01 int strstr(char* s, char* p)
02 {
03     int fast=0;
04     int slow=0;
05     int j=0;
06     while(s[fast]!=){
07         if(s[fast++]==p[j++])
08             ;
09         else{
10             slow++;
11             fast=slow;
12             j=0;
13         }
14         if(p[j]==)
15             return slow;
16     }
17     return 1;
18 }
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