Re: i write code but dont understand the error please help me
<mohammaditraders@gmail.com> wrote in message...
My suggestions inline below:
// > #include <iostream.h>
// > #include <stdlib.h>
// > #include <conio.h>
// > #include <string.h>
#include <iostream>
#include <cstdlib>
#include <string>
class Matrix{ private :
int numRows, numCols ;
int elements [30] [30] ;
public :
Matrix(){
// > cout<<"paratmerized constructor called";
std::cout<<"paratmerized constructor called";
}
Matrix( int rows , int cols ) ;
void getMatrix ( ) ;
void displayMatrix ( ) ;
Matrix :: Matrix operator+();
};
// > Matrix :: Matrix ( int rows = 0 , int cols = 0){
// > numCols = cols ; // > numRows = rows ;
Matrix :: Matrix ( int rows = 0 , int cols = 0) : // note that colon
numRows( rows ), numCols( cols ){
for ( int i = 0 ; i < numRows ; ++i ){
for ( int j = 0 ; j < numCols ; ++j ){
elements [ i ] [ j ] = 0 ;
}
}
}
void Matrix :: getMatrix ( ){
for ( int i = 0 ; i < numRows ; ++i ){
for ( int j = 0 ; j < numCols ; ++j ){
// > cin >> elements [ i ] [ j ] ;
std::cin >> elements [ i ] [ j ] ;
file://cout<<"Enter the 1st Matrix";
}
}
file://cout<<"Enter the 2nd Matrix"<<endl;
}
void Matrix :: displayMatrix ( ){
for ( int i = 0 ; i < numRows ; ++i ){
// > cout << "| " ;
std::cout << "| " ;
for ( int j = 0 ; j < numCols ; ++j ){
// > cout << elements [ i ] [ j ] << " " ;
std::cout << elements [ i ] [ j ] << " " ;
}
// > cout << "|" << endl ;
std::cout << "|" << endl ;
}
// > cout<<'\n'; // > cout<<'\n';
std::cout<<"\n"<<std::endl;
}
Matrix :: Matrix operator + (Matrix add){
Matrix temp;
temp.numCols=numCols + add.numCols;
temp.numRows=numRows + add.numRows;
return temp;
}
// > void main ( )
int main ( ){
Matrix matrix1(2, 2), matrix2(2,2) ;
matrix1.getMatrix ( ) ;
matrix2.getMatrix();
file://Matrix = matrix1 + matrix2 ;
matrix1.displayMatrix ( ) ;
matrix2.displayMatrix ( ) ;
// > system ( "PAUSE" ) ;
// > getch();
std::string dummy;
std::cin >> dummy;
}
Your main problems were:
1] wrong headers
2] unqualified 'std::'
3] main() returns type 'int', **always**!!
4] it's ++x or x++ ( NO space between them)
Try the corrections above, and post again if you have problems. But, post
what you expect the program to do, what you get, and the first 3 errors you
get if it doesn't compile.
--
Bob R
POVrookie