Program to find multiplication of two matrices.


    #include <stdio.h>

    #define MAXROW		10
    #define MAXCOL		10


    /*User Define Function to Read Matrix*/
    void readMatrix(int m[][MAXCOL],int row,int col)
    {
	    int i,j;
	    for(i=0;i< row;i++)
	    {
		    for(j=0;j< col;j++)
		    {
			    printf("Enter element [%d,%d] : ",i+1,j+1);
			    scanf("%d",&m[i][j]);
		    }
	    }
    }

    /*User Define Function to Read Matrix*/
    void printMatrix(int m[][MAXCOL],int row,int col)
    {
	    int i,j;
	    for(i=0;i< row;i++)
	    {
		    for(j=0;j< col;j++)
		    {
			    printf("%d\t",m[i][j]);
		    }
		    printf("\n");
	    }
    }

    int main()
    {
	    int a[MAXROW][MAXCOL],b[MAXROW][MAXCOL],result[MAXROW][MAXCOL];
	    int i,j,r1,c1,r2,c2;
	    int sum,k;
	
		
	    printf("Enter number of Rows of matrix a: ");
	    scanf("%d",&r1);
	    printf("Enter number of Cols of matrix a: ");
	    scanf("%d",&c1);
	
	    printf("\nEnter elements of matrix a: \n");
	    readMatrix(a,r1,c1);
	
	
			
	    printf("Enter number of Rows of matrix b: ");
	    scanf("%d",&r2);
	    printf("Enter number of Cols of matrix b: ");
	    scanf("%d",&c2);
	
	    printf("\nEnter elements of matrix b: \n");
	    readMatrix(b,r2,c2);
	
	
	    if(r1==c2)
	    {
		    /*Multiplication of two matrices*/
		    for(i=0;i< r1;i++)
		    {
			    for(j=0;j< c1;j++)
			    {
				    sum=0;
				    for(k=0;k< r1;k++)
				    {
					    sum=sum + (a[i][k]*b[k][j]);
				    }
				    result[i][j]=sum;
			    }
		    }
		
		    /*print matrix*/
		    printf("\nMatrix after multiplying elements (result matrix):\n");
		    printMatrix(result,r1,c1);		
			
		
	    }
	    else
	    {
		    printf("\nMultiplication can not be done.");
	    }

	
	    return 0;
    }
    
    Enter number of Rows of matrix a: 3 
    Enter number of Cols of matrix a: 3 

    Enter elements of matrix a: 
    Enter element [1,1] : 1 
    Enter element [1,2] : 2 
    Enter element [1,3] : 3 
    Enter element [2,1] : 4 
    Enter element [2,2] : 5 
    Enter element [2,3] : 6 
    Enter element [3,1] : 7 
    Enter element [3,2] : 8 
    Enter element [3,3] : 9 

    Enter number of Rows of matrix b: 3 
    Enter number of Cols of matrix b: 3 

    Enter elements of matrix b: 
    Enter element [1,1] : 1 
    Enter element [1,2] : 1 
    Enter element [1,3] : 1 
    Enter element [2,1] : 2 
    Enter element [2,2] : 2 
    Enter element [2,3] : 2 
    Enter element [3,1] : 3 
    Enter element [3,2] : 3 
    Enter element [3,3] : 3 

    Matrix after multiplying elements (result matrix): 
    14	14	14	 
    32	32	32	 
    50	50	50