hdoj2004

#include<iostream> #include<cmath> using namespace std; int main() { int x; while( cin >> x) { if( x < 0 || x > 100) { cout << "Score is error !" << endl; } else if( x >= 90) { cout << "A" << endl; } else if( x >= 80) { cout << "B" << endl; } else if( x >= 70) { cout << "C" << endl; } else if( x >= 60) { cout << "D" << endl; } else cout << "E" << endl; } system("pause"); }