Matrices Multiplication

Matrix Multiplication in C

/*
 ----------------------------------------------------------------------------
 Function    : multiplyMatrices
 Description : Multiply two matrices. Note: The resultmatrix can be reused
               for multiple matrix multiplications - no need to preintialize
               the array with '0'.
 ----------------------------------------------------------------------------
 */
inline void multiplyMatrices(int matrixA[200][200], int aRows, int aCols,
                             int matrixB[200][200], int bRows, int bCols, 
                             int resultMatrix[200][200]) {
 
    /* ---------------------------------------------------------------------*/
    // Perform the matrix multiplication with the 'Einstein Summation' method
    /* ---------------------------------------------------------------------*/
    int i, j, k, sum;
    for( i = 0; i < aRows; i++ ) {
       for( j = 0; j < bCols; j++ ) {
           for( k = 0, sum = 0; k < aCols; k++ ) {
               // Example:
               // [1 1] [1 1]
               // [2 2] [1 1] = [2 2]
               //               [4 4]
               sum += matrixA[i][k] * matrixB[k][j];
           }
           resultMatrix[i][j] = sum;
       }
    }
}