Primary school students fun C ++ programming lesson 25 grade

Primary school students c ++ programming information

Link: https://pan.baidu.com/s/1XlA5AcjDXz5YWOFT32gSmw 
extraction code: 9iz9 

#include <iostream> 
using namespace std; 
int main () 
{ 
  int n; 
  char score; 
  cout << "Please enter score:"; 
  cin >> n; 
  switch (n / 10) // n, 10 are integers, n / 10 is also an integer 
  { 
    case 10: 
    case 9: score = 'A'; break; 
    case 8: 
    case 7: score = 'B'; break; 
    case 6: score = 'C'; break; 
    case 5: 
    case 4: 
    case 3: 
    case 2: 
    case 1: 
    case 0: score = 'D'; break; 
    default: score = ''; break; // A space is assigned to score 
  } 
  cout << score; 
  return 0; 
}