switch case multiple range in C

Question

switch (mark / 10) {
    case 10:
    case 9:
    case 8:
    printf("The Grade is A.\n");
    break;
    case 7:
    printf("The Grade is B.\n");
}
}
}

mark >= 75 gives Grade A.
May I know how to edit the case 7 so that it can detect 75 and above as Grade A. Thank You!

How about `if (mark >= 75) { ... } else if (mark >= ...) { ... } ...` — Some programmer dude, Aug 18 '17 at 08:21
There are what? five or six different grades plus invalid input. Write a function that returns the grade and use simple `if`s in the function. Because the body of the `if` returns immediately, there's no need to use `if`/`else` chains. — M Oehm, Aug 18 '17 at 08:23
https://stackoverflow.com/questions/3602827/what-is-the-behavior-of-integer-division — Lundin, Aug 18 '17 at 08:23
if you do not care abut portability use gcc switch case range extension — 0___________, Aug 18 '17 at 08:24

score 4 · Answer 1 · edited Aug 18 '17 at 08:41

4

If you plan to use only gcc you can use switch ranges:

https://gcc.gnu.org/onlinedocs/gcc/Case-Ranges.html

switch (mark) {
    case 75 ... 100:
       printf("The Grade is A.\n");
       break;

    case 70 ... 74:
       printf("The Grade is B.\n");
       break

    /*....*/
}

edited Aug 18 '17 at 08:41

unalignedmemoryaccess

7,246
2
25
40

answered Aug 18 '17 at 08:36

0___________

60,014
4
34
74

score 2 · Answer 2 · answered Aug 18 '17 at 08:42

2

For this task simply use if statement

if (mark >= 75 && mark < 100) {
    //A
} else if (mark >= 70 && mark < 75) {
    //B
} else { /* Invalid */ }

answered Aug 18 '17 at 08:42

unalignedmemoryaccess

7,246
2
25
40

switch case multiple range in C

2 Answers2