#include<iostream>
int main()
{
int matrix[3][3];
for (size_t row=0; row<3; ++row)
{
for (size_t col=0; col<3; ++col)
{
std::cout << "Enter a value for element [" << row << "][" << col << "]: ";
std::cin >> matrix[row][col];
}
}
std::cout << std::endl;
for (size_t row=0; row<3; ++row)
{
for (size_t col=0; col<3; ++col)
{
std::cout << matrix[row][col] << '\t';
}
std::cout << std::endl;
}
std::cout << std::endl;
}
#include<iostream>
#include<array>
#include<limits>
#include<random>
using namespace std;
const size_t max_row = 3;
const size_t max_col = 3;
using array3x3 = std::array<std::array<int, max_col>, max_row>;
int get_min (const array3x3& arr)
{
int min = INT_MAX;
for (size_t row=0; row!=max_row; ++row)
for (size_t col=0; col!=max_col; ++col)
if (arr[row][col] < min)
min = arr[row][col];
return min;
}
int get_max (const array3x3& arr)
{
int max = INT_MIN;
for (size_t row=0; row!=max_row; ++row)
for (size_t col=0; col!=max_col; ++col)
if (max < arr[row][col])
max = arr[row][col];
return max;
}
int main()
{
std::default_random_engine generator;
std::uniform_int_distribution<int> distribution (-10, 10);
cout << "Array\n" << endl;
array3x3 arr;
for (size_t row=0; row!=max_row; ++row)
{
for (size_t col=0; col!=max_col; ++col)
{
arr[row][col] = distribution (generator);
cout << arr[row][col] << '\t';
}
cout << endl;
}
cout << endl;
cout << "Minimum = " << get_min (arr) << endl;
cout << "Maximum = " << get_max (arr) << endl;
}
#include<iostream>
#include<array>
#include<climits>
#include<cassert>
#include<time.h>
// 3x3 matrix typedef
using Row = std::array<int, 3>;
using Matrix = std::array<Row, 3>;
int smallest (Matrix& matrix)
{
int small = INT_MAX;
for (size_t r=0; r<matrix.size(); ++r)
{
const Row& row = matrix[r];
for (size_t col=0; col<row.size(); ++col)
{
if (row[col]<small)
small=row[col];
}
}
return small;
}
int main()
{
srand((unsigned)time(nullptr));
std::cout << "Matrix:\n" << std::endl;
Matrix matrix;
for (size_t r=0; r<matrix.size(); ++r)
{
Row& row = matrix[r];
for (size_t col=0; col<row.size(); ++col)
{
row[col] = rand();
std::cout << row[col] << '\t';
}
std::cout << std::endl;
}
std::cout << std::endl;
std::cout << "Smallest value in matrix: " << smallest (matrix) << std::endl;
std::cout << std::endl;
}
#include<iostream>
#include<iomanip>
#include<fstream>
#include<random>
#include<time.h>
std::ostream& write_value (std::ostream& os, unsigned value)
{
for (unsigned size = sizeof(unsigned); size; --size, value >>= 8)
os.put (static_cast<char>(value & 0xFF));
return os;
}
std::istream& read_value (std::istream& is, unsigned& value)
{
value = 0;
for (unsigned size = 0; size < sizeof(unsigned); ++size)
{
unsigned read = static_cast<unsigned>(is.get());
read <<= (8 * size);
value |= read;
}
return is;
}
int main()
{
// The filename.
const char * filename = "test.dat";
// pseudo-random number generator.
std::default_random_engine generator;
generator.seed ((unsigned) time (NULL));
std::uniform_int_distribution<unsigned> distribution (0, 1000);
// Instantiate a 3x3 matrix.
unsigned matrix[3][3];
// Fill matrix with random numbers (print as we go).
std::cout << "Matrix:\n" << std::endl;
for (unsigned dim1=0; dim1<3; ++dim1)
{
for (unsigned dim2=0; dim2<3; ++dim2)
{
matrix[dim1][dim2] = distribution (generator);
std::cout << std::setw (4) << matrix[dim1][dim2] << " ";
}
std::cout << std::endl;
}
std::cout << std::endl;
// Instantiate an output file.
std::ofstream outfile;
outfile.open (filename, std::ios::out | std::ios::binary);
// Write the matrix to the file.
for (unsigned dim1=0; dim1<3; ++dim1)
for (unsigned dim2=0; dim2<3; ++dim2)
write_value (outfile, matrix[dim1][dim2]);
outfile.close();
// Instantiate an input file.
std::ifstream infile;
infile.open (filename, std::ios::in | std::ios::binary);
// Read first value (initial lowest value).
unsigned lowest = 0;
if (read_value (infile, lowest))
{
// Read remainder of file.
unsigned current;
while (read_value (infile, current))
{
// Update the lowest value if the
// current value is lower.
if (current < lowest)
lowest = current;
}
}
infile.close();
std::cout << "Lowest value: " << lowest << std::endl;
}
#include<iostream>
#include<array>
#include<limits>
#include<random>
using namespace std;
const size_t max_row = 3;
const size_t max_col = 3;
using array3x3 = std::array<std::array<int, max_col>, max_row>;
int get_min (const array3x3& arr)
{
int min = INT_MAX;
for (size_t row=0; row!=max_row; ++row)
for (size_t col=0; col!=max_col; ++col)
if (arr[row][col] < min)
min = arr[row][col];
return min;
}
int get_max (const array3x3& arr)
{
int max = INT_MIN;
for (size_t row=0; row!=max_row; ++row)
for (size_t col=0; col!=max_col; ++col)
if (max < arr[row][col])
max = arr[row][col];
return max;
}
int main()
{
std::default_random_engine generator;
std::uniform_int_distribution<int> distribution (-10, 10);
cout << "Array\n" << endl;
array3x3 arr;
for (size_t row=0; row!=max_row; ++row)
{
for (size_t col=0; col!=max_col; ++col)
{
arr[row][col] = distribution (generator);
cout << arr[row][col] << '\t';
}
cout << endl;
}
cout << endl;
cout << "Minimum = " << get_min (arr) << endl;
cout << "Maximum = " << get_max (arr) << endl;
}
int main()
{
int a[3][3] = {{1,2,3},{4,-5,6},{7,8,9}};
int smallest = INT_MAX;
for (size_t row=0; row<3; ++row)
{
for (size_t col=0; col<3; ++col)
{
if (a[row][col]<smallest) smallest = a[row][col];
}
}
assert (smallest==-5);
}
int largest(int a[],int n)
{
int i;
int l=a[0];
for (i=0;i<n;i++)
if (a[i]>l)
l=a[i];
cout<<l;
}
You basically write a nested for loop (one for within another one), to copy the elements of the matrix to a new matrix.
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maltiplication of matrix for algorithme
Write a program in c++ that take input in a integer matrix of size 4*4 and find out if the entered matrix is diagonal or not.
4.(Displaying matrix of 0s and 1s ) write a method that displays by n by n matrix using the following header : Public static void printMatrix(int n) Each element is o or 1,which is generated randomely. Write a test program that prints a 3 by 3 matrix that may look like this: 010 000 111 4.(Displaying matrix of 0s and 1s ) write a method that displays by n by n matrix using the following header : Public static void printMatrix(int n) Each element is o or 1,which is generated randomely. Write a test program that prints a 3 by 3 matrix that may look like this: 010 000 111
You basically write a nested for loop (one for within another one), to copy the elements of the matrix to a new matrix.
Did you know that memory allocation is not needed to display the matrix? However, the C program is to find the sum of all the elements.
Reduced matrix is a matrix where the elements of the matrix is reduced by eliminating the elements in the row which its aim is to make an identity matrix.
i cant write
They are the number in the matrix.
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A sparse matrix is a matrix in which most of the elements are zero.
No. A scalar matrix is a diagonal matrix whose main diagonal elements are the same. Only if the diagonal elements are all 1 is it an identity matrix.
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write a program to multily 3*3 matrix.
maltiplication of matrix for algorithme
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