exitfun

+  main.cpp
+  echo.vcxproj -> D:\KHU\2018\2학기\오픈소스\e4\a6\echo\Debug\echo.exe
+  echo.vcxproj -> D:\KHU\2018\2학기\오픈소스\e4\a6\echo\Debug\echo.pdb (Partial PDB)

+#TargetFrameworkVersion=v4.0:PlatformToolSet=v141:EnableManagedIncrementalBuild=false:VCToolArchitecture=Native32Bit:WindowsTargetPlatformVersion=10.0.14393.0
+Debug|Win32|D:\KHU\2018\2학기\오픈소스\e4\a6\echo\|

 #include <iostream>
 #include <string>
 using namespace std;
-void main()
+int main()
 {
 	string a;
 	cin >> a;
+	if (a == "exit")
+	{
+		
+		exit(0);
+	}
 	cout << a << endl;
+	return 0;
 }
\ No newline at end of file