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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	   int rows;
  6.     // Getting the number of rows.
  7.     cout << "Enter the Number of rows - \n";
  8.     cin >> rows;
  9.  
  10.     cout << "Triangle of " << rows << " using * -\n";
  11.  
  12.     // Main logic to print triangle. 
  13.     for( int i = 0; i < rows; i++ ) {
  14.         for( int j = 0; j <= i; j++ ){
  15.             cout << "*  ";
  16.         }
  17.         cout<<endl;
  18.     }
  19.  
  20.    cout << "Triangle of " << rows << " using integers -\n";
  21.  
  22.     // Main logic to print triangle. 
  23.     for( int i = 0; i < rows; i++ ) {
  24.         for( int j = 0; j <= i; j++ ){
  25.             cout << i + 1 << " ";
  26.         }
  27.         cout<<endl;
  28.     }
  29.  
  30.     cout << "Triangle of " << rows << " using characters -\n";
  31.  
  32.     // Main logic to print triangle. 
  33.     for( int i = 0; i < rows; i++ ) {
  34.         for( int j = 0; j <= i; j++ ){
  35.             cout << (char)('A' + j) << " ";
  36.         }
  37.         cout<<endl;
  38.     }
  39.  
  40.  
  41.     return 0;
  42. }
Success #stdin #stdout 0.01s 5300KB
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stdin
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6
stdout
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Enter the Number of rows - 
Triangle of 6 using * -
*  
*  *  
*  *  *  
*  *  *  *  
*  *  *  *  *  
*  *  *  *  *  *  
Triangle of 6 using integers -
1 
2 2 
3 3 3 
4 4 4 4 
5 5 5 5 5 
6 6 6 6 6 6 
Triangle of 6 using characters -
A 
A B 
A B C 
A B C D 
A B C D E 
A B C D E F
https://ideone.com/ZovRZA
language:
C++ (gcc 8.3)
created:
12 days ago
visibility:
public

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