C++ TUTORIAL 5

TUTORIAL 5 SJEM2231: STRUCTURED PROGRAMMING (C++)

QUESTION 1

Write a C++ program to find the mean (average) of N numbers stored in an array

#include <iostream>

using namespace std;

int main()

{

int n, i;

float number[100], sum=0, average;

cout << "Enter the total numbers of data: ";

cin >> n;

while (n >100 || n<=0)

{

cout << "Error! the number should in range of (1 to 100).\n”;

cout << “Plase enter the number again: “;

cin >> n;

}

for(i=0; i<n; i++)

{

cout << “Enter a number: “;

cin >> number[i];

sum= sum + number[i];

}

average=sum / n;

cout << “\nThe average is: “ << average << endl;

return 0;

}

//Output:

Enter the total numbers of data: 101

Error! the number should in range of (1 to 100).

Plase enter the number again: -4

Error! the number should in range of (1 to 100).

Plase enter the number again: 5

Enter a number: 4

Enter a number: 7

Enter a number: 2

Enter a number: 9

Enter a number: 15

The average is: 7.4

QUESTION 2

Write a C++ program to find the smallest number in one-dimensional array of order n

#include<iostream>


int main()

{

int n,i, farhan[20], min;


cout << "Enter the total number of elements for 1-D array : ";

cin >> n;

for(i=0;i<n;i++)

{

cout <<"Enter the element of farhan: ";

cin >> farhan[i];

}

min = farhan[0];

for(i=0;i<n;i++)

{

if(min > farhan[i])

min= farhan[i];

}

cout <<"\nThe smallest element is: " << min << endl;

return 0;

}

//Output:

Enter the total number of elements for 1-D array : 7

Enter the element of farhan: 3







The smallest element is: 1

QUESTION 3

Write a C++ program to add the given two matrices.

#include <iostream>


int main()

{

int m,n,c,d, first[10][10], second[10][10], sum[10][10];

cout << "Enter the number of rows and columns of matrix" << endl;

cin >> m>> n;

cout << "Enter the elements of first matrix \n";

for( c=0; c<m ; c++)

for(d=0; d<n ; d++)

cin >> first [c][d];

cout << "Enter the elements of second matrix \n";

for(c=0; c<m; c++)

for(d=0; d<n; d++)

cin >> second[c][d];


for (c=0;c<m;c++)

for(d=0;d<n;d++)

sum[c][d]= first[c][d] + second[c][d];

cout << "The summation of entered matrixes :- \n";

for(c=0; c<m; c++)

{

for(d=0; d<n; d++)

cout << sum[c][d] << "\t";

cout << endl;

}

return 0;

}

//Output :

Enter the number of rows and columns of matrix

4 4

Enter the elements of first matrix

1 2 3 4

5 6 7 8

9 10 11 12

13 14 15 16

Enter the elements of second matrix

1 2 3 4

5 6 7 8

9 10 11 12

13 14 15 16

The summation of entered matrixes :-

2 4 6 8

10 12 14 16

18 20 22 24

26 28 30 32

QUESTION 4

Write a C++ program to find the transpose of a given matrix.

// Using for loop:

#include <iostream>


int main()

{

int m,n,c,d, matrix[10][10];

do

{

cout << "Enter the no. of rows & columns of matrix(MAX 10x10):" << endl;

cin >> m >> n ;

}

while (m<1 || n<1 || m>10 || n>10);

cout << "Enter the elements of matrix \n";

for( c=0; c<m ; c++)


for(d=0; d<n ; d++)

cin >> matrix [c][d];

cout << "The transpose of the entered matrixes :- \n";

for(c=0; c<n ; c++)

{

for(d=0; d < m; d++)

cout << matrix[d][c] << "\t";

cout << endl;

}

return 0;

}

// Output:

Output 1:


4 4

Enter the elements of matrix

1 2 3 4

5 6 7 8

9 10 11 12

13 14 15 16

The transpose of the entered matrixes :-

1 5 9 13

2 6 10 14

3 7 11 15

4 8 12 16

Output 2:


4 7

Enter the elements of matrix

1 2 3 4 5 6 7

8 9 10 11 12 13 14

15 16 17 18 19 20 21

22 23 24 25 26 27 28

The transpose of the entered matrixes :-

1 8 15 22

2 9 16 23

3 10 17 24

4 11 18 25

5 12 19 26

6 13 20 27

7 14 21 28

QUESTION 5

Write a C++ program for multiplication of given two matrices

2X2 DIMENSION ONLY

#include <iostream>


int main()

{

int m,n,c,d, first[2][2], second[2][2], mult[2][2];

cout << "Enter the number of rows and columns of matrix" << endl;


cin >> m>> n;


for( c=0; c<m ; c++)

for(d=0; d<n ; d++)



for(c=0; c<m; c++)

for(d=0; d<n; d++)


for (c=0;c<m;c++)

for(d=0;d<n;d++)

mult[c][d]= first[c][0] * second[0][d] + first[c][1] * second[1][d];

cout << "Multiplication of entered matrixes :- \n";

for(c=0; c<m; c++)

{

for(d=0; d<n; d++)

cout << mult[c][d] << "\t";

cout << endl;

}

return 0;

}

//Output :


2 2


1 2

3 4


1 2

3 4

Multiplication of entered matrixes :-

7 10

15 22

FOR OTHER DIMENSIONS UP TO 10X10 (FIRST ALTERNATIVE)

#include <iostream>


int main()

{

int m,n,k,l,c,d, first[10][10], second[10][10], mult[10][10];

cout << "Enter the number of rows and columns of first matrix" << endl;

cin >> m>> n;

// m denotes number of rows in first matrix

// n denotes number of columns in first matrix


for( c=0; c<m ; c++)


for(d=0; d<n ; d++)


cout << "Enter the number of rows and columns of second matrix" << endl;

cin >> k >> l;

// k denotes number of rows in second matrix

// l denotes number of columns in second matrix


for(c=0; c<k; c++)

for(d=0; d<l; d++)


if(n==k)

{

for(c=0;c<m;c++)

{

for(d=0;d<l;d++)

{

mult[c][d]=0;

for(int x=0; x < k ; x++)

{

mult[c][d]= mult[c][d]+ first[c][x]* second[x][d];

}

}

}

cout<<"\nThe multiplication of first matrix and second matrix is : " << endl;

for(c=0; c<m; c++)

{

for(d=0 ; d<l;d++)

{

cout<< mult[c][d] << "\t";

}

cout<< endl;

}

}

else

{

cout<<"\n\nMultiplication is not possible" ;

}

return 0;

}

//Output :

Output 1:

Enter the number of rows and columns of first matrix

4 4


1 2 3 4

5 6 7 8


9 10 11 12

13 14 15 16

Enter the number of rows and columns of second matrix

4 4


16 15 14 13

12 11 10 9

8 7 6 5

4 3 2 1

The multiplication of first matrix and second matrix is :

80 70 60 50

240 214 188 162

400 358 316 274

560 502 444 386

Output 2:

Enter the number of rows and columns of first matrix

2 5


1 2 3 4 5

6 7 8 9 10

Enter the number of rows and columns of second matrix

5 3


1 2 3

4 5 6

7 8 9

10 11 12

13 14 15

The multiplication of first matrix and second matrix is :

135 150 165

310 350 390

FOR OTHER DIMENSIONS UP TO 10X10 (SECOND ALTERNATIVE)

#include <iostream>


int main ()

{

int m,n,a,b,i,j,k,sum = 0,A[10][10],B[10][10];

cout << "THE MULTIPLICATION OF TWO MATRICES WITH

DIFFERENT DIMENSIONS" << endl;

cout << "COLUMN OF 1ST = ROW OF 2ND" << endl;

do

{

cout << "\nPlease enter the dimension of the first Matrix(MAX 10x10):" <<

endl;

cin >> m >> n ;

cout << "Please enter the dimension of the second Matrix(MAX 10x10):"

<< endl;


cin >> a >> b ;

} while (m<1 || n<1 || m>10 || n>10 || a<1 || b<1 || a>10 || b>10 || n!=a);

cout << "Please enter the first matrix:" << endl;

for (i=0;i<m;i++)

for (j=0;j<n;j++)

cin >> A[i][j] ;

cout << "Please enter the second matrix:" << endl;

for (i=0;i<a;i++)

for (j=0; j<b;j++)

cin >> B[i][j] ;

cout << "\nThe multiplication of two matrices is:" << endl;

for (i=0;i<m;i++)

{

for (j=0;j<b;j++)

{

for (k=0; k<n; k++)

sum = sum + A[i][k] * B[k][j];

cout << sum << "\t" ;

}

cout << endl;

}

return 0;

}

//Output:

THE MULTIPLICATION OF TWO MATRICES WITH DIFFERENT DIMENSIONS

COLUMN OF 1ST = ROW OF 2ND

Please enter the dimension of the first Matrix(MAX 10x10):

2 9

Please enter the dimension of the second Matrix(MAX 10x10):

2 1

Please enter the dimension of the first Matrix(MAX 10x10):

3 2

Please enter the dimension of the second Matrix(MAX 10x10):

2 4

Please enter the first matrix:

1 2

3 4

5 6

Please enter the second matrix:

1 2 3 4

5 6 7 8

The multiplication of two matrices is:

11 25 42 62

85 115 152 196

231 277 334 402

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C++ TUTORIAL 5