﻿ Transpose a matrix ~ Programming Tutorials by SourceTricks
Thursday, July 12, 2012

Transpose a matrix

Write a program to transpose a matrix

e.g.) Input matrix.
1  2  3
4 5 6
7 8 9

Transposed matrix.
1 4 7
2 5 8
3 6 9

C++ program to transpose a matrix

```#include <iostream>
#include <cstdlib>
#include <ctime>
using namespace std;

int main() {
srand(time(0));

int m = 3;
int n = 3;
int** matrix = (int**) calloc(sizeof(int), m);
for ( int i = 0; i < m; i++ ) {
matrix[i] = (int*) calloc(sizeof(int), n);
}

// Fill random values in the matrix
for ( int i = 0; i < m; i++ ) {
for ( int j = 0; j < n; j++ ) {
matrix[i][j] = rand() % 100;
}
}

// Print the matrix
for ( int i = 0; i < m; i++ ) {
for ( int j = 0; j < n; j++ ) {
cout << matrix[i][j] << " ";
}
cout << endl;
}

cout << endl;

// Transpose
for ( int i = 0; i < m; i++ ) {
for ( int j = i + 1; j < n; j++ ) {
int tmp = matrix[i][j];
matrix[i][j] = matrix[j][i];
matrix[j][i] = tmp;
}
}

// Print the transposed matrix
cout << "Transposed matrix" << endl;
for ( int i = 0; i < m; i++ ) {
for ( int j = 0; j < n; j++ ) {
cout << matrix[i][j] << " ";
}
cout << endl;
}

delete[] matrix;
}```

Output:-
```89 33 10
92 87 4
69 33 74

Transposed matrix
89 92 69
33 87 33
10 4 74```

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