1. #include<iostream>
2. using namespace std;
3. int main()
4. {
5.     int marks;
6.  
7.     cout<<"Enter your marks for checking your grade: ";
8.     cin>>marks;
9.  
10.     if(marks>=0 && marks<40)
11.     {
12.         cout<<"Your grade is F "<<endl;
13.     }
14.     else if(marks>=40 && marks<45)
15.     {
16.         cout<<"Your grade is C- "<<endl;
17.     }
18.     else if(marks>=45 && marks<50)
19.     {
20.         cout<<"Your grade is C "<<endl;
21.     }
22.     else if(marks>=50 && marks<55)
23.     {
24.         cout<<"Your grade is C+ "<<endl;
25.     }
26.     else if(marks>=55 && marks<60)
27.     {
28.         cout<<"Your grade is B- "<<endl;
29.     }
30.     else if(marks>=60 && marks<65)
31.     {
32.         cout<<"Your grade is B "<<endl;
33.     }
34.     else if(marks>=65 && marks<70)
35.     {
36.         cout<<"Your grade is B+ "<<endl;
37.     }
38.     else if(marks>=70 && marks<75)
39.     {
40.         cout<<"Your grade is A- "<<endl;
41.     }
42.     else if(marks>=75 && marks<80)
43.     {
44.         cout<<"Your grade is A "<<endl;
45.     }
46.     else if(marks>=80 && marks<=100)
47.     {
48.         cout<<"Your grade is A+ "<<endl;
49.     }
50.     else
51.     {
52.         cout<<"Please enter any number between 0 to 100"<<endl;
53.     }
54.  
55. }
56.