Code not able to run on online judge

#1

My code is working well in local IDE but not able to summit to online judge.
#include
using namespace std;
int main() {
char ch;
int N1,N2;
cin>>ch;
while( ch!=‘X’ && ch!=‘x’)
{
cin>>N1>>N2;
switch(ch)
{
case ‘+’:
{
cout<< N1+N2<<endl;
break;
}
case ‘-’:
{
cout<<N1-N2<<endl;
break;
}
case '’:
{
cout<<N1N2<<endl;
break;
}
case ‘/’:
{
cout<<N1/N2<<endl;
break;
}
case ‘X’:case ‘x’:{
break;
}
case ‘%’:
{
cout<<N1%N2<<endl;
break;
}
default:
{
cout<<“Invalid operation. Try again.”<<endl;
}
}
cin>>ch;
}
return 0;
}

#2

@mandeepchohan96 Please save your code on ide.codingblocks.com and share its link.

#3

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