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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5.     int arr[3][4] = {
  6.         {1, 2, 3, 4},
  7.         {5, 6, 7, 8},
  8.         {9, 10, 11, 12}
  9.     };
  10.  
  11.     int row = sizeof(arr)/sizeof(arr[0]);
  12.     int col = sizeof(arr[0])/sizeof(arr[0][0]);
  13.  
  14.     cout << "Original Matrix:" << endl;
  15.     for(int i = 0; i < row; i++) {
  16.         for(int j = 0; j < col; j++) {
  17.             cout << arr[i][j] << " ";
  18.         }
  19.         cout << endl;
  20.     }
  21.  
  22.     cout << "Transposed Matrix:" << endl;
  23.     // Switch the loop order: Columns become the outer loop
  24.     for(int j = 0; j < col; j++) {
  25.         for(int i = 0; i < row; i++) {
  26.             // Access by [i][j] but in column-major order
  27.             cout << arr[i][j] << " ";
  28.         }
  29.         cout << endl;
  30.     }
  31.  
  32.     return 0;
  33. }
Success #stdin #stdout 0.01s 5276KB
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stdin
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Standard input is empty
stdout
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Original Matrix:
1 2 3 4 
5 6 7 8 
9 10 11 12 
Transposed Matrix:
1 5 9 
2 6 10 
3 7 11 
4 8 12
https://ideone.com/OJxPWO
language:
C++14 (gcc 8.3)
created:
3 days ago
visibility:
public

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