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C - Interchange Elements of First and Last in a Matrix Across Columns Code Example

The code for Interchange Elements of First and Last in a Matrix Across Columns

void interchangeFirstLast(int mat[][n])
{
    // swap the elements between first and last columns
    for (int i = 0; i < n; i++) {
        int t = mat[i][0];
        mat[i][0] = mat[i][n - 1];
        mat[i][n - 1] = t;
    }
}