nie-ii-year

lab stuff from undergrad second year.
git clone http://git.hanabi.in/repos/nie-ii-year.git
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matrix.cpp (2294B)

      1 #include <iostream>
      2 
      3 class matrix{
      4   int row, col, **p;
      5 public:
      6   int getR(){
      7     return this->row;
      8   };
      9   int getC(){
     10     return this->col;
     11   };
     12   matrix(){
     13     p = NULL;
     14   };
     15   bool initMatrix(int r, int c){
     16     row = r; col = c;
     17     p = new int *[row];
     18     for (int i = 0; i < row; i++) {
     19       p[i] = new int [col];
     20     }
     21     if(p == NULL){
     22       std::cout << "Insufficient memory." << '\n';
     23       return 1;
     24     }
     25     return 0;
     26   };
     27   bool operator==(matrix other){
     28     if(this->row == other.row && this->col == other.col)
     29       return true;
     30     return false;
     31   };
     32 
     33   matrix operator+(matrix other){
     34     matrix r;
     35     if(r.initMatrix(other.getR(), other.getC()))
     36       std::cout << "Insufficient memory." << '\n';
     37     else{
     38       for(int i = 0; i < row; i++)
     39         for(int j = 0; j < col; j++)
     40           r.p[i][j] = this->p[i][j] + other.p[i][j];
     41       return r;
     42     }
     43   };
     44 
     45   matrix operator-(matrix other){
     46     matrix r;
     47     if(r.initMatrix(other.getR(), other.getC()))
     48       std::cout << "Insufficient memory." << '\n';
     49     else{
     50       for(int i = 0; i < row; i++)
     51         for(int j = 0; j < col; j++)
     52           r.p[i][j] = this->p[i][j] - other.p[i][j];
     53       return r;
     54     }
     55   };
     56 
     57   void getData(){
     58     for (int i = 0; i < row; i++)
     59       for(int j = 0; j < col; j++)
     60         std::cin >> p[i][j];
     61   };
     62   void operator <<(int x){
     63     for (int i = 0; i < row; i++){
     64       for(int j = 0; j < col; j++)
     65         std::cout << p[i][j] << " ";
     66         std::cout << std::endl;
     67     }
     68   };
     69 };
     70 
     71 int main(){
     72   matrix m, n, a, s;
     73   int r, c;
     74   do{
     75     std::cout << "Enter rows and columns of first matrix: ";
     76     std::cin >> r >> c;
     77     if(r < 1 || c < 1)
     78       std::cout << "Invalid size, try again." << '\n';
     79   }while (r < 1 || c < 1);
     80   if(m.initMatrix(r, c))
     81     return 0;
     82   do{
     83     std::cout << "Enter rows and columns of second matrix: ";
     84     std::cin >> r >> c;
     85     if(r < 1 && c < 1)
     86       std::cout << "Invalid size, try again." << '\n';
     87   }while (r < 1 && c < 1);
     88   if(n.initMatrix(r, c))
     89     return 0;
     90   std::cout << "Enter first matrix:" << '\n';
     91   m.getData();
     92   std::cout << "Enter second matrix: " << '\n';
     93   n.getData();
     94   if(m == n) {
     95     a = m + n;
     96     a << 0;
     97     s = m - n;
     98     s << 0;
     99   }
    100   else {
    101     std::cout << "Incompatible.\n";
    102     m << 0;
    103     n << 0;
    104   }
    105   return 0;
    106 }