C++ Help (Integer Pattern) -

the question :

if sequence of digits in x forms substring of sequence of digits in y, outputs "x substring of y"; otherwise, if sequence of digits in x forms subsequence of sequence of digits in y, outputs "x subsequence of y"; otherwise, outputs "x neither substring nor subsequence of y".

do not use arrays or strings in program

the output should follows

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enter y : 239847239

enter x : 847

x substring of y

enter y : 239847239

enter x : 3923

x subsequence of y

enter y : 239847239

enter x : 489

x neither substring nor subsequence of y

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and below got far... (haven't coded subsequence clueless)

i know coding unefficient , suitble use above model output. improvements or comments how fix appreciated.

  #include <cmath>   #include <iostream>   using namespace std;   int main() { cout << "enter y: " ;         int y;         cin >> y;  cout << "enter x: ";         int x;         cin >> x;          if (y >= x){               // below possibilities of substrings 9 decimal places.                 if( x == (y % 10)) cout << "x substring of y";                 else if (x == (y % 100)) cout << "x substring of y";                 else if (x == (y % 1000)) cout << "x substring of y";                 else if (x == (y % 10000)) cout << "x substring of y";                 else if (x == (y % 100000)) cout << "x substring of y";                 else if (x == (y % 1000000)) cout << "x substring of y";                 else if (x == (y % 10000000)) cout << "x substring of y";                 else if (x == (y % 100000000)) cout << "x substring of y";                 else if (x == (y % 1000000000)) cout << "x substring of y";                  else    cout << "x neither substring nor subsequence of y";         }         else cout << "neither subsequence nor subset"; // prints out when  y less x. return 0; 

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