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  1.  
  2. #include<stdio.h>
  3. #include<math.h>
  4. int main()
  5. {
  6.     double tb,a,b,c;
  7.     char loai,dau;
  8.     scanf("%lf%lf%lf",&a,&b,&c);
  9.     tb=0.1*a+0.2*b+0.7*c;
  10.     if(tb<4)
  11.     {
  12.         loai = 'F';
  13.     }
  14.     if(4<=tb&&tb<4.8)
  15.     {
  16.         loai = 'D';
  17.     }
  18.     if(4.8<=tb&&tb<5.5)
  19.     {
  20.         loai = 'D';
  21.         dau = '+';
  22.     }
  23.     if(5.5<=tb&&tb<6.3)
  24.     {
  25.         loai = 'C';
  26.     }
  27.     if(6.3<=tb&&tb<7.0)
  28.     {
  29.         loai = 'C';
  30.         dau = '+';
  31.     }
  32.     if(7.0<=tb&&tb<7.8)
  33.     {
  34.         loai = 'B';
  35.     }
  36.     if(7.8<=tb&&tb<8.5)
  37.     {
  38.         loai = 'B';
  39.         dau= '+';
  40.     }
  41.     if(8.5<=tb&&tb<9.0)
  42.     {
  43.         loai = 'A';
  44.     }
  45.     if(9.0<=tb&&tb<=10)
  46.     {
  47.         loai = 'A';
  48.         dau = '+';
  49.     }
  50.     printf("%.2lf %c%c",tb,loai,dau);
  51.     return 0;
  52. }
Success #stdin #stdout 0s 5520KB
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5.2 6.0 6.5
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6.27 C+
https://ideone.com/aaQHHC
language:
C (gcc 8.3)
created:
1 year ago
visibility:
public

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