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C programs QnA

Q. If sum of two integer is 14 and if one of them is 8 then find other integer. Ans: Well, this is very simple. Simply, one integer is 8 and sum of two integers is 14. So, we need to subtract the number 8 from their sum of 14 to get the second number. So, the second number is: 14 - 8 = 6 C-Program of this task Code---> #include<stdio.h> int main () { int num1 = 8 , num2 , sum = 14 ; num2 = sum - num1 ; printf ( "The second number is: %d" , num2 ); return 0 ; }
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3x3 Matrix addition and multiplication in C++



In this C++ program we will add and multiply two matrices and print the result on the screen.The elements of the matrices will be taken from the user.

input:

The elements of matrices.

output:

The addition and multiplication of the two matrices.

CODE---->


#include<iostream>
using namespace std;
class matrix{
 private:
  int mat[10][10];
 public:
  matrix()
  {
   int i,j;
   for(i=1;i<=3;i++)
   {
    for(j=1;j<=3;j++)
    {
     mat[i][j]=0;
    }
   }
  }
  int getdata()
  {
   int i,j,n;
   for(i=1;i<=3;i++)
   {
    for(j=1;j<=3;j++)
    {
     cout<< "\nEnter data(" <<i <<"," <<j << "): "; 
     cin>> n;
     mat[i][j]=n;
    }
   }
  }
  int displaydata()
  {
   int i,j;
   cout<< "\n";
   for(i=1;i<=3;i++)
   {
    for(j=1;j<=3;j++)
    {
     cout<< mat[i][j] <<"\t";
    }
    cout<<"\n";
   }
  }
  matrix operator+(matrix ob2)
  {
   int i,j;
   int x[10][10];
   for(i=1;i<=3;i++)
   {
    for(j=1;j<=3;j++)
    {
     x[i][j]=0;
     x[i][j]=mat[i][j]+ob2.mat[i][j];
    }
   }
   cout<< "\nThe addition result is: \n";
   cout<< "---------------------------\n";
   for(i=1;i<=3;i++)
   {
    for(j=1;j<=3;j++)
    {
     cout<< x[i][j] <<"\t";
    }
    cout<<"\n";
   }
  }
  matrix operator*(matrix ob2)
  {
   int i,j,k;
   int x[20][20];
   for(i=1;i<=3;i++)
   {
    for(j=1;j<=3;j++)
    {
     x[i][j]=0;
     for(k=1;k<=3;k++)
     {
      x[i][j]+=mat[i][k]*ob2.mat[k][j];
     }
    }
   }
   cout<< "\nThe multiplication result is: \n";
   cout<< "---------------------------------\n";
   for(i=1;i<=3;i++)
   {
    for(j=1;j<=3;j++)
    {
     cout<< x[i][j] <<"\t";
    }
    cout<<"\n";
   }
  }
 };
int main()
{
 matrix ob1,ob2,ob3,ob4;
 cout<< "Enter data for first matrix: ";
 ob1.getdata();
 cout<< "\nFirst created matrix is: \n";
 cout<< "-------------------------";
 ob1.displaydata();
 cout<< "\nEnter data for second matrix: ";
 ob2.getdata();
 cout<< "\nSecond created matrix is: \n";
 cout<< "--------------------------";
 ob2.displaydata();
 ob3=ob1+ob2;
 ob4=ob1*ob2;
 return 0;
}

Download the C++ file of this Program.

Don't just read, run on your pc !!!


RESULT :


Enter data for first matrix:
Enter data(1,1): -1

Enter data(1,2): 5

Enter data(1,3): 8

Enter data(2,1): -4

Enter data(2,2): 0

Enter data(2,3): 12

Enter data(3,1): 19

Enter data(3,2): -8

Enter data(3,3): 9

First created matrix is:
-------------------------
-1       5       8
-4       0       12
19       -8       9

Enter data for second matrix:
Enter data(1,1): 3

Enter data(1,2): -2

Enter data(1,3): 0

Enter data(2,1): 7

Enter data(2,2): 15

Enter data(2,3): 6

Enter data(3,1): -10

Enter data(3,2): 18

Enter data(3,3): 19

Second created matrix is:
--------------------------
3       -2       0
7       15       6
-10       18       19

The addition result is:
---------------------------
2       3       8
3       15      18
9      10      28

The multiplication result is:
---------------------------------
-48      221      182
-132      224      228
-89      4      123

--------------------------------
Process exited after 71.35 seconds with return value 0
Press any key to continue . . .


Images for better understanding :


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