MatrixPrint.cpp

#include<iostream>
#include<iomanip>
using namespace std;

int main() {
  cout << " 3 : " << bitset<32>(3) << endl;
  cout << "~3 : " << bitset<32>(~3) << endl;

  cout << "i &  3 の計算" << endl;
  cout << "===========" << endl;
  for(int i = 0; i < 16; i++){
    cout << setw(2) << i << " &  3 = " << (i & 3) << endl;  
  }
  cout << endl;

  cout << "i & ~3 の計算" << endl;
  cout << "===========" << endl;
  for(int i = 0; i < 16; i++){
    cout << setw(2) << i << " & ~3 = " << (i & ~3) << endl;  
  }
  cout << endl;

  cout << "４✕４マトリックス表" << endl;
  cout << "===================" << endl;
  for (int i = 0; i < 16; ++i){
    cout << setw(2) << (i&~3)+(i%4) << " ";
    if ((i+1)%4==0)
      cout << endl; 
  }
  cout << endl; 

  cout << "行列C=A✕B" << endl;
  cout << "===================" << endl;
  for (int i = 0; i < 16; ++i)
  {
    const int j(i & 3), k(i & ~3);
    cout << "C[" << setw(2) << i << "] = ";        
    cout << "A[" << setw(2)  <<  0 + j << "] * B[" << setw(2)  << k + 0 << "] + ";
    cout << "A[" << setw(2)  <<  4 + j << "] * B[" << setw(2)  << k + 1 << "] + ";
    cout << "A[" << setw(2)  <<  8 + j << "] * B[" << setw(2)  << k + 2 << "] + ";
    cout << "A[" << setw(2)  << 12 + j << "] * B[" << setw(2)  << k + 3 << "]" << endl;
  }
}