#include <stdio.h> #include <stdlib.h> int main (){ int m , n ; system ( "clear" ); printf ( "Enter the number of Rows : " ); scanf ( " %d " , & m ); printf ( "Enter the Number of Columns :" ); scanf ( " %d " , & n ); int arr_1 [ m ][ n ], arr_2 [ m ][ n ]; printf ( " \n First Matrix: \n " ); // Taking input of First Matrix . . . for ( int i = 0 ; i < m ; i ++ ){ for ( int j = 0 ; j < n ; j ++ ){ printf ( "a[ %d ][ %d ]" , i + 1 , j + 1 ); scanf ( " %d " , & arr_1 [ i ][ j ]); } } printf ( " \n Second Matrix: \n " ); // Taking input of Third Matrix . . . for ( int i = 0 ; i < m ; i ++ ){ for ( int j = 0 ; j < n ; j ++ ){ printf ( "b[ %d ][ %d ]" , i + 1 , j + 1 ); scanf ( " %d " , & arr_2 [ i ][ j ]); } } printf ( ...