Help me please !!

Question

Where is the error ?
https://code.sololearn.com/cem7bTJplvpR/?ref=app

Answer 1

Yes as Ina said use '==' and not '=' to test for equality. Otherwise you are assigning the value to the variable. Also better to use 'else if' and 'else' after the initial 'if'. But it looks like you're using a very crude way to calculate the arcsine (inverse sine) of a value by testing for just a set of discrete values. Maybe look at including math.h or related library/header and use its related functions (e.g. asin).

https://www.tutorialspoint.com/c_standard_library/c_function_asin.htm

Answer 2

You have to use check equality by == operator not assigned a value in if statement

Answer 3

if ( a == not if ( a =