Why cant i compile it?

Question

#include<iostream.h>
#include<conio.h>
void main()
{
int A[10][10],B[10][10],C[10][10];
int ra,rb,ca,cb,r,c;
cout<<"\n input row and column matrix A";
cin>>ra>>ca;
cout<<"\n input row and column of matrix B";
cin>>rb>>cb;
if ((ra==rb)&&(ca==cb))
{
cout<<"\n input matrix A";
for(r=0;r<ra;r++)
{
for(c=0;c<ca;c++)
{
cin>>A[r][c];
}
}
cout<<"\n input matrix B";
for(r=0;r<ra;r++)
{
for(c=0;c<ca;c++)
{
cin>>B[r][c];
}
}
cout<<"\n matrix A+matrix B=";
for(r=0;r<ra;r++)
{
for(c=0;c<ca;c++)
{
C[r][c]=A[r][c]+B[r][c];
cout<<' '<<C[r][c];
}
cout<<endl;
}
}
else
cout<<"\n matrix is incompactible";
getch();
}

Answer 1

- #include <iostream>

- add "using namespace std;" or "std::" every time you use cout etc.

- change void main() to int main() and return 0

- remove getch() in Sololearn (will compile, but won't work)