Row Average, column Average and Matrix Average of a Random Matrix

#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
#define max 5

int mat[max][max];

void main()
{
int i,j;
int row_sum[max];
int col_sum[max];
int mat_sum = 0;
clrscr();
randomize();
printf("\n\n RANDOM MATRIX \n\n");
for(i=0;i<max;i++)
{
 row_sum[i] = 0;
 printf("\n");
 for(j=0;j<max;j++)
 {
  if(i==0)
   col_sum[j] = 0;
  mat[i][j] = random(10);
  col_sum[j] += mat[i][j];
  row_sum[i] += mat[i][j];
  mat_sum += mat[i][j];
  printf(" %d",mat[i][j]);
 }
}

getch();

printf("\n\n Row Sums");
for(i =0; i<max; i++)
 printf("\n Row %d = %d",i+1,row_sum[i]);

printf("\n\n Column Sums");
for(i =0; i<max; i++)
 printf("\n Column %d = %d",i+1,col_sum[i]);

printf("\n\n Matrix Sum = %d",mat_sum);
getch();
}

Multiplication of Matrices

#include<iostream.h>
#include<conio.h>
#define max 10


 void in_mat(int[max][max],int,int);
 void disp_mat(int[max][max],int,int);
 void mul_mat(int[max][max],int[max][max],int[max][max],int,int,int);


 void main()
  {
   int x[max][max],y[max][max],z[max][max],a,b,c,d;
   clrscr();
   do
   {
   cout<<"\n\n Enter the numbers of rows n columns of matrix #1 : ";
   cin>>a>>b;
   cout<<"\n\n Enter the numbers of rows n columns of matrix #2 : ";
   cin>>c>>d;
   if ( b != c )
    cout<<"\n\n Matrices can't be multiplied .. !! ";
   }while( b != c );
   cout<<"\n\n Now, The Matrices can be multiplied .. !! ";
   getch();


   cout<<"\n\n\n\n Enter the elements for the following matrices \n";
   cout<<"\n\n Enter for the Matrix #1 \n";
   in_mat(x,a,b);
   cout<<"\n\n Enter for the Matrix #2 \n";
   in_mat(y,c,d);
   clrscr();
   cout<<"\n\n The following matrices are : ";
   cout<<"\n\n\t\t Matrix #1 :- ";
   disp_mat(x,a,b);
   cout<<"\n\n\t\t Matrix #2 :- ";
   disp_mat(y,c,d);
   mul_mat(x,y,z,a,d,b);
   cout<<"\n\n\t The Product of the above two matrices are \n";
   disp_mat(z,a,d);
   getch();
  }


 void in_mat(int mat[max][max],int row,int col)
  {
   int i,j;
   for(i=0;i<row;i++)
    {
     cout<<"\n Enter its elements for Row #"<<i+1<<" : ";
     for(j=0;j<col;j++)
       cin>>mat[i][j];
    }
  }


 void disp_mat(int mat[max][max],int row,int col)
  {
   int i,j;
   for(i=0;i<row;i++)
    {
     cout<<"\n\t Row #"<<i+1<<" :";
     for(j=0;j<col;j++)
      cout<<"  "<<mat[i][j];
    }
  }


 void mul_mat(int mat1[max][max],int mat2[max][max],int mat3[max][max],int r1,int c2,int r2c1)
  {
   int i,j,k;
   for(i=0;i<r1;i++)
    {
     for(j=0;j<c2;j++)
      {
       mat3[i][j] = 0;
       for(k=0;k<r2c1;k++)
mat3[i][j] += mat1[i][k] * mat2[k][j];
      }
    }
  }