# Scilab_assignment_1

Q: Write a C/C++ function multiply(mat1,mat2) which accepts two double matrices- mat1 & mat2 from Scilab console, checks if the dimensions are correct for matrix multiplication, computes the product and displays the product on Scilab console.

Sol: Make sure that the current directory for Scilab is the one in which you have installed Scilab. Copy the file "matrixMultiplication.c" in this directory. Now execute the following command from the Scilab console:

files=["matrixMultiplication.c"];

WITHOUT_AUTO_PUTLHSVAR = %t;

ilib_build('build_lib',['multiply','multiply'],files,[]);

exec loader.sce

Now perform the multiplication using the function multiply(mat1, mat2)

eg 1)-->result = multiply([1 2 ; 3 4] , [1 2; 3 4])

result =

7.     10.  
15.    22.` 

eg 2)--> result2 = multiply([6 2 ; 9 0 ; -5 4] , [5 2 -7 0 5 ; 23 8 99 -1 5])

result2 =

76.    28.    156.  - 2.    40.  
45.    18.  - 63.     0.    45.  
67.    22.    431.  - 4.  - 5.`   

eg 3) --> result3 = multiply([6 2 1 ; 9 0 1 ; -5 4 1] , [5 2 -7 0 5 ; 23 8 99 -1 5])

                                                         !--error 999 

multiply: Wrong size for input arguments: No. of column in 1st matrix should be equal to no. of row of 2nd matrix.

eg 4)-->result4 = multiply([6 2 ],[%t %t])

                         !--error 999 

multiply: Wrong type for input argument #2: A real matrix expected.