Write a program to Multiply two matrices using function


Input


#include<stdio.h>
void multiply(int mat1[12][12],int mat2[12][12],int ,int ,int );

void main()
{
    int mat1[12][12],mat2[12][12];
    int i,j,k,m,n,p;
    printf("Enter the number of rows and columns for 1st matrix :\n");
    scanf("%d%d",&m,&n);
    printf("Enter the elements of the 1st matrix :\n");
    for(i=0;i<m;i++)
    {
        for(j=0;j<n;j++)
        {
            scanf("%d",&mat1[i][j]);
        }
    }
    // (number of columns of 1st matrix = number of rows of 2nd matrix)
    printf("Enter the number of columns for 2nd matrix :\n");
    scanf("%d",&p);
    printf("Enter the elements of the 2nd matrix :\n");
    for(i=0;i<n;i++)
    {
        for(j=0;j<p;j++)
        {
            scanf("%d",&mat2[i][j]);
        }
    }
   
    printf("The 1st matrix :\n");
    for(i=0;i<m;i++)
    {
        for(j=0;j<n;j++)
        {
            printf("%d\t",mat1[i][j]);
        }
        printf("\n");
    }
    printf("The 2nd matrix :\n");
    for(i=0;i<n;i++)
    {
        for(j=0;j<p;j++)
        {
            printf("%d\t",mat2[i][j]);
        }
        printf("\n");
    }
    multiply(mat1,mat2,m,n,p);
}

void multiply(int mat1[12][12],int mat2[12][12],int m,int n,int p)
{
    int mul[12][12],i,j,k;
    for(i=0;i<m;i++)
    {
        for(j=0;j<p;j++)
        {
            mul[i][j]=0;
            for(k=0;k<n;k++)
            {
                mul[i][j]=mul[i][j]+mat1[i][k]*mat2[k][j];
            }
        }
    }

    printf("The resultant matrix formed on multiplying the two matrices :\n");
    for(i=0;i<m;i++)
    {
        for(j=0;j<p;j++)
        {
            printf("%d\t",mul[i][j]);
        }
        printf("\n");
    }
}




Output


Enter the number of rows and columns for 1st matrix :
2
3
Enter the elements of the 1st matrix :
1
2
3
8
4
5
Enter the number of columns for 2nd matrix :
2
Enter the elements of the 2nd matrix :
3
4
5
3
7
8
The 1st matrix :
1    2    3   
8    4    5   
The 2nd matrix :
3    4   
5    3   
7    8   
The resultant matrix formed on multiplying the two matrices :
34    34   
79    84