c++ - Finding substring not working -


this code supposed return yes if string has 'nadia' no otherwise. when submitted said wrong answer although wokring on sample tests.? know missing?

#include<iostream> #include<string> #include<vector> using namespace std; int main() {     int t;     bool flag = false;     bool flag2 = false;     bool flag3 = false;     bool flag4 = false;      int count = 0;     vector<string>v;     cin >> t;     string x;         (int = 0; < t; i++)         {             cin >> x;             v.push_back(x);         }          (int = 0; < v.size(); i++)         {             x = v[i];             (int = 0; < x.length(); i++)             {                 if (x.at(i) == 'n')                 {                     flag = true;                     (int = 0; < x.length(); i++)                     {                         if (x.at(i) == 'a')                         {                             ++count;                             flag2 = true;                             (int = 0; < x.length(); i++)                             {                                 if (x.at(i) == 'd')                                 {                                     flag3 = true;                                     (int = 0; < x.length(); i++)                                     {                                         if (x.at(i) == 'i')                                         {                                             flag4 = true;                                         }                                     }                                 }                             }                         }                     }                 }             }             if ((flag) && (flag2) && (flag3) && (flag4) && (count >= 2))             {                 cout << "yes" << endl;              }             else             {                 cout << "no" << endl;              }             count = 0;             flag = false;             flag2 = false;             flag3 = false;             flag4 = false;         }          system("pause");         return 0; }

sample input:

3 anhaldillooa nnaaddiiaa nxzdiao

sample output:

yes yes no

you're building state machine find substrings.

try std::string::find

std::string str ("there 2 needles in haystack needles."); std::string str2 ("needle");  // different member versions of find in same order above: std::size_t found = str.find(str2); if (found!=std::string::npos)   std::cout << "first 'needle' found at: " << found << '\n';

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