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  1. #include <stdio.h>
  2. #include <iostream>
  3.  
  4. using namespace std;
  5.  
  6. int modexp(int x, int y, int N)
  7. {
  8.   if (y == 0) return 1;
  9.   int z = modexp(x, y / 2, N);
  10.   if (y % 2 == 0)
  11.     return (z*z) % N;
  12.   else
  13.     return (x*z*z) % N;
  14. }
  15. int main()
  16. {
  17.   int x, y, N;
  18.   cout << "x= "; cin >> x;
  19.   cout << "y= "; cin >> y;
  20.   cout << "N= "; cin >> N;
  21.   cout << modexp(x, y, N);
  22.   cin.get(); cin.get();
  23.   return 0;
  24. }
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
prog.c:2:20: fatal error: iostream: No such file or directory
 #include <iostream>
                    ^
compilation terminated.
stdout
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Standard output is empty
https://ideone.com/IJ02wM
language:
C (gcc 8.3)
created:
7 years ago
visibility:
public

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