Given a matrix, clockwise-rotate elements in it. Please add code to problem3.cpp and the makefile. I have also given the main_problem3.cpp and problem3.h to test.
problem3.cpp:::
#include "problem3.h"
// A function to rotate a matrix mat[][MAX]
void rotatematrix(int m, int n, int mat[][MAX])
{
// your code here
}
Makefile:::
all : problem3.o
g++ -o mainp3 # your code here
problem3.o : problem3.h problem3.cpp
# your code here
clean:
rm -f *.o mainp3
main_problem3.cpp:::
#include <iostream>
#include "problem3.h"
using namespace std;
int main(){
int m=4,n=8;
int a[][100] = { {1, 2, 3, 4, 5, 6,7,8},
{5, 6, 7, 8, 9, 10, 11,12},
{9, 10, 11, 12, 13, 14,15,16},
{13, 14, 15, 16, 17, 18, 19, 20} };
for (int i=0; i<m; i++){
for (int j=0; j<n; j++)
cout << a[i][j] << " ";
cout << endl;
}
cout<<endl;
rotatematrix(m,n,a);
for (int i=0; i<m; i++){
for (int j=0; j<n; j++)
cout << a[i][j] << " ";
cout << endl;
}
}
problem3.h:::
#ifndef LAB4_PROBLEM3
#define LAB4_PROBLEM3
#define MAX 100
void rotatematrix(int m, int n, int mat[][MAX]);
#endif
Hello Learner,
Thanks for the question.
As per the question I need to write the code for rotatematrix that will rotate a given matrix in clockwise direction. As you haven’t specified the angle to which it needs to be rotated I have assumed it to the shift one element in clockwise direction.
Code:
void rotatematrix(int m,int n,int mat[][100]){
{
int row = 0, col = 0;
int prev, cur;
while (row < m && col < n)
{
if (row + 1 == m || col + 1 == n)
break;
prev = mat[row + 1][col];
for (int i = col; i < n; i++)
{
cur = mat[row][i];
mat[row][i] = prev;
prev = cur;
}
row++;
for (int i = row; i < m; i++)
{
cur = mat[i][n-1];
mat[i][n-1] = prev;
prev = cur;
}
n--;
if (row < m){
for (int i = n-1; i >= col; i--)
{
cur = mat[m-1][i];
mat[m-1][i] = prev;
prev = cur;
}
}
m--;
if (col < n)
{
for (int i = m-1; i >= row; i--)
{
cur = mat[i][col];
mat[i][col] = prev;
prev = cur;
}
}
col++;
}
}
}
Please let me know if you have any further questions.
If you find the answer useful, please upvote.
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