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Switch Statement Vs if-else statement

Lets say I want to write a program that asks users for a score (0-100) and assign a letter grade (A-E) to the score, is it possible to use a switch statement (without having 101 cases) or if-else statement is better? . . . int score; if ((score >= 80) && (score < 90)) cout << "You've got a B\n"; else if ((score >= 70) && (score < 80)) cout << "You've got a C\n"; . . .

19th Jul 2017, 5:24 AM
Ojala McOpiyo
Ojala McOpiyo - avatar
3 odpowiedzi
+ 10
If you need to check ranges (like you would do for a grading system), you must use if/else. A switch only checks for specific, single values.
19th Jul 2017, 5:55 AM
Tamra
Tamra - avatar
+ 1
with GCC and LLVM/Clang, both support ranges in switch case statement. Not sure if this is in the language standard or just compiler extension. Here is how it looks: switch(marks){ case 1 ... 49: printf("fail"); break; case 50 ... 64: printf("credit"); break; ... ... }
19th Jul 2017, 5:58 AM
Venkatesh Pitta
Venkatesh Pitta - avatar
+ 1
With a switch, you can run the same code for multiple cases, but you can't include an inequality/range. switch(score){ case 1: case 2: case 3: grade = "C"; break; case 4: case 5: case 6: grade = "B"; break; default: grade = "A"; } OR if (score < 4){ grade = "C"; } else if (score < 7){ grade = "B"; } else { grade = "A" } Seems like the if else statements are easier.
19th Jul 2017, 6:06 AM
James
James - avatar