Question

Cum as putea extrage o submatrice dintr-o matrice ?, capetele acesteia(submatricei) fiind introduse de la tastatura?

Answer 1

#include <iostream>

using namespace std;

int a[100][100]; // Matrice mare

int b[100][100]; // Matrice mica

int main(){

//Citire matrice

int n,m,i,j;

cout << "Introduceti dimensiuni : ";

cin >> n >> m;

cout << "Introduceti matrice : \n";

for(i=1;i<=n;i++){

       for(j=1;j<=m;j++) cin >> a[i][j];

}

//Citire coordonate capete

int pi,pj,qi,qj;

cout << "Introduceti coordonate cap I : ";

cin >> pi >> pj;

cout << "Introduceti coordonate cap II : ";

cin >> qi >> qj;

//Construire submatrice

for(i=pi;i<=qi;i++){

       for(j=pj;j<=qj;j++) b[i-pi+1][j-pj+1] = a[i][j];

}

//Afisare matrice mica

   cout << "Submatrice :\n";

   for(i=1;i<qi-pi+2;i++){

       for(j=1;j<qj-pj+2;j++) cout << b[i][j]<< " ";

       cout << endl;

}

}