charactor quoting problem

[tharindu11]

I wanted to quote character upper come, " ' " in swithch statement but it showed two errors(in the last row), in visual c++.

"IntelliSense: quoted string should contain at least one character"
"IntelliSense: missing closing quote"


Is there a way to quote upper coma?

#include<iostream>
#include<conio.h>

using namespace std;


void main(){

	char sym;
	int col;
start:

	cout<<"Please enter a symbol :";
	cin>>sym;

	switch(sym){
	case '-':
	case '"':
	case ',':
		case ''': 

[MrHutch]

You need to escape it.

case '\'':

[tharindu11]

Thank you :)