Home > Cpp > C++ Program for Matrix manipulation (menu based) by using Multi Dimensional Array and SWITCH CASE – Q6

## C++ Program for Matrix manipulation (menu based) by using Multi Dimensional Array and SWITCH CASE – Q6

Q6. Program Matrix manipulation (menu based):

for following Matrix manipulations:
ii) Multiply two matrices
iii) Find the difference
iv) Find the sum of Rows and Sum of Cols.

… from College notes (BCA/MCA assignments):

```#include <iostream.h>
#include <conio.h>
#include <stdlib.h>

void Init_Matrix (int [][3], int [][3]);
void Disp_Matrix (int [][3], int [][3]);
void Add_Matrix  (int [][3], int [][3]);
void Sub_Matrix  (int [][3], int [][3]);
void Mult_Matrix (int [][3], int [][3]);
void Sum_R_C     (int [][3], int [][3]);

void main(){
int mat1[3][3], mat2[3][3];
int ch;
clrscr();
cout<<"\n Matrix Operation of Order (3*3):- \n";
Init_Matrix(mat1, mat2);
while(1){
clrscr();
Disp_Matrix(mat1, mat2);
cout<<"\n Matrix Operation of Order (3*3):- \n";
cout<<"\n 1 -> Change Elements of Matrices.";
cout<<"\n 3 -> Subtract Matrices.";
cout<<"\n 4 -> Multiply Matrices.";
cout<<"\n 5 -> Sum of ROWs n COLs.";
cout<<"\n 6 -> Exit.";
cin>>ch;
switch(ch){
case 1:
Init_Matrix(mat1, mat2);
break;
case 2:
break;
case 3:
Sub_Matrix(mat1, mat2);
break;
case 4:
Mult_Matrix(mat1, mat2);
break;
case 5:
Sum_R_C(mat1, mat2);
break;
case 6:
exit(1);
default:
cout<<"\n Enter Correct Choice.";
} // end of switch.
getch();
} // end of while.
} // end of main.

void Init_Matrix(int mat1[][3], int mat2[][3]){
cout<<"\n Enter the Elments of First Matrix: ";
for(int i=0; i<3; i++)
for(int j=0; j<3; j++)
cin>>mat1[i][j];
cout<<"\n Enter the Elments of First Matrix: ";
for(i=0; i<3; i++)
for(j=0; j<3; j++)
cin>>mat2[i][j];
}

void Disp_Matrix(int mat1[][3], int mat2[][3]){
cout<<"\n First matrix is:- \n";
for(int i=0; i<3; i++){
for(int j=0; j<3; j++)
cout<<" "<<mat1[i][j];
cout<<endl;
}

cout<<"\n Second matrix is:- \n";
for(i=0; i<3; i++){
for(int j=0; j<3; j++)
cout<<" "<<mat2[i][j];
cout<<endl;
}
}

int tot[3][3];
for(int i=0; i<3; i++)
for(int j=0; j<3; j++)
tot[i][j] = mat1[i][j] + mat2[i][j];

cout<<"\n Addition of 2 Matrices:- \n";
for(i=0; i<3; i++){
for(int j=0; j<3; j++)
cout<<" "<<tot[i][j];
cout<<endl;
}
}

void Sub_Matrix(int mat1[][3], int mat2[][3]){
int tot[3][3];
for(int i=0; i<3; i++)
for(int j=0; j<3; j++)
tot[i][j] = mat1[i][j] - mat2[i][j];

cout<<"\n Subtraction of 2 Matrices:- \n";
for(i=0; i<3; i++){
for(int j=0; j<3; j++)
cout<<" "<<tot[i][j];
cout<<endl;
}
}

void Mult_Matrix(int mat1[][3], int mat2[][3]){
int tot[3][3];
for(int i=0; i<3; i++)
for(int j=0; j<3; j++){
tot[i][j]=0;
for(int k=0; k<3; k++)
tot[i][j] = tot[i][j] +
(mat1[i][k]*mat2[k][j]);
}
cout<<"\n Multiplication of 2 Matrices:- \n";
for(i=0; i<3; i++){
for(int j=0; j<3; j++)
cout<<" "<<tot[i][j];
cout<<endl;
}
}

void Sum_R_C(int mat1[][3], int mat2[][3]){
int row=0, col=0;
cout<<"\n Sum of ROWs and COLs :- \n";
cout<<"\n First Matrix :- \n";
// Sum of row of mat1.
for(int i=0; i<3; i++){
for(int j=0; j<3; j++){
cout<<"  "<<mat1[i][j];
row = row + mat1[i][j];
}
cout<<" -  "<<row;
row = 0;
cout<<endl;
}
cout<<"\n  |  |  | \n";
// Sum of col of mat1.
for(i=0; i<3; i++){
for(int j=0; j<3; j++)
col = col + mat1[j][i];
cout<<"  "<<col;
col = 0;
}

cout<<"\n\n Second Matrix :- \n";
// Sum of row of mat2.
for(i=0; i<3; i++){
for(int j=0; j<3; j++){
cout<<"  "<<mat2[i][j];
row = row + mat2[i][j];
}
cout<<" -  "<<row;
cout<<endl;
row = 0;
}
cout<<"\n  |  |  | \n";
// Sum of col of mat2.
for(i=0; i<3; i++){
for(int j=0; j<3; j++)
col = col + mat2[j][i];
cout<<"  "<<col;
col = 0;
}
}
```

Output:

Matrix Operation of Order (3*3):-

Enter the Elments of First Matrix: 2 1 3 5 4 9 8 6 7

Enter the Elments of First Matrix: 3 1 4 2 5 6 9 8 0

First matrix is:-
2 1 3
5 4 9
8 6 7

Second matrix is:-
3 1 4
2 5 6
9 8 0

Matrix Operation of Order (3*3):-
1 -> Change Elements of Matrices.
3 -> Subtract Matrices.
4 -> Multiply Matrices.
5 -> Sum of ROWs n COLs.
6 -> Exit.

5 2 7
7 9 15
17 14 7

First matrix is:-
2 1 3
5 4 9
8 6 7

Second matrix is:-
3 1 4
2 5 6
9 8 0

Matrix Operation of Order (3*3):-
1 -> Change Elements of Matrices.
3 -> Subtract Matrices.
4 -> Multiply Matrices.
5 -> Sum of ROWs n COLs.
6 -> Exit.
Subtraction of 2 Matrices:-
-1 0 -1
3 -1 3
-1 -2 7

First matrix is:-
2 1 3
5 4 9
8 6 7

Second matrix is:-
3 1 4
2 5 6
9 8 0

Matrix Operation of Order (3*3):-
1 -> Change Elements of Matrices.
3 -> Subtract Matrices.
4 -> Multiply Matrices.
5 -> Sum of ROWs n COLs.
6 -> Exit.

Multiplication of 2 Matrices:-
35 31 14
104 97 44
99 94 68

1 -> Change Elements of Matrices.
3 -> Subtract Matrices.
4 -> Multiply Matrices.
5 -> Sum of ROWs n COLs.
6 -> Exit.

Sum of ROWs and COLs :-

First Matrix :-
2 1 3 – 6
5 4 9 – 18
8 6 7 – 21
| | |
15 11 19

Second Matrix :-
3 1 4 – 8
2 5 6 – 13
9 8 0 – 17
| | |
14 14 10

Categories: Cpp
1. October 13, 2020 at 12:12 pm

while declaring func in beginning in line 5 why u left space in int[??] [3 ] in place of my que mark.
we can write 3 at that place too if i am not wrong

• October 13, 2020 at 12:20 pm

Yes, you can write 3 in the first dimension as well, but that’s optional that’s why I had left it blank.