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  1. #include <iostream>
  2. using namespace std;
  3.  
  4.  
  5.  
  6. int isSubstring(string s1, string s2)
  7. {
  8.     int M = s1.length();
  9.     int N = s2.length();
  10.  
  11.     /* A loop to slide pat[] one by one */
  12.     for (int i = 0; i <= N - M; i++) {
  13.         int j;
  14.  
  15.         /* For current index i, check for
  16.                                             pattern match */
  17.         for (j = 0; j < M; j++)
  18.             if (s2[i + j] != s1[j])
  19.                 break;
  20.  
  21.         if (j == M)
  22.             return i;
  23.     }
  24.  
  25.     return -1;
  26. }
  27.  
  28. int main() {
  29.  
  30. 	string str="ahmed";
  31. 	string str1="e";
  32. 	 int found = isSubstring(str1,str);
  33.  
  34.     cout<<found;
  35.  
  36. 	return 0;
  37. }
Success #stdin #stdout 0.01s 5508KB
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https://ideone.com/f5vMht
language:
C++ (gcc 8.3)
created:
1 year ago
visibility:
public

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