#include <iostream>
using namespace std;
int main(int argc,char* argv[])
{
 int x=1,y=2;
 bool r1 = x==y;
 bool r2 = x>y;
 bool r3 = x<y;
 bool r4 = x>=y;
 bool r5 = x<=y;
 bool r6 = x!=y;
 cout<<x<<" == "<<y<<" :"<<r1<<"\n";
 cout<<x<<" > "<<y<<" :"<<r2<<"\n";
 cout<<x<<" < "<<y<<" :"<<r3<<"\n";
 cout<<x<<" >= "<<y<<" :"<<r4<<"\n";
 cout<<x<<" <= "<<y<<" :"<<r5<<"\n";
 cout<<x<<" != "<<y<<" :"<<r6<<"\n";
}

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관계연산자에는 ==,>,<,>=,<=,!=가 있다.