something wrong in do while loop please correct this

[thin path]

program asks to enter enter grade between 0 to 100 if its true it will print valid grade if its less than 0 or above 100 it should print invalid grade. This code almost correct but something wrong look at output.

[hidden sluice]

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[thin path]

if i input value greater than 100 it prints "invalid grade" as well as "you have entered a valid grade %d"

[oblique marlin]

can you simulate on your head or pen/paper or with a debugger what is happenning when user enters 6453?

like step by step of the program flow from top to bottom

then i think you'll see why

[thin path]

the printf in while statement will only run if condition in while satisfy right? which is grade must be >0 and < 100?

[oblique marlin]

do you mean the one on line 10 or which

[thin path]

line 9

[oblique marlin]

that while governs when the do-while loop runs or exits yeah

[thin path]

my question is why it prints invalid grade as valid grade the last line in output?

[oblique marlin]

the printf on line 10 is outside the do-while loop's block

it will run when the loop exists

it is unconditional

[thin path]

oh how do i fix this

[oblique marlin]

well delete that printf? :p

but you want to say "that was valid" on valid inputs?

[thin path]

hah but it should also print when i enter a valid grade between 0 to 100

yes

[oblique marlin]

i see

after user enters the grade you are checking if it was invalid right?

then printing "invalid grade"

if it is not invalid, i.e., if that if statement's condition is not satisfied, then it is valid grade

[thin path]

yes

[oblique marlin]

so what goes together with if to say "otherwise"?

else, isn't it

if (grade_is_good)
    print("ok")
else
    print("bad")

^pseudocode, not valid C code at the moment

[thin path]

oh got it i was dumb

[oblique marlin]

cool

[thin path]

now it works, thanks

[oblique marlin]

np

[hidden sluice]

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