#include<iostream>
#include<iostream.h>
#include<math.h>
#include<tring.h>
int a,b,c;
using namespace std;
int main();
{cin>>a>>b>>c;
cout<<"gia tri a="<<a<<endl<<"gia tri b="<<b<<endl<<"gia tri c="<<c;
}

Line 17: error: tring.h: No such file or directory
Line 8: error: expected unqualified-id before '{' token
compilation terminated due to -Wfatal-errors.