Why it is showing 'No Output' on console window?

Question

https://code.sololearn.com/cAcEq4JtstR7/?ref=app

Answer 1

Strings (=char arrays) need double quotes. Single quotes are only for single characters.
Also, you can't compare strings with ==. You need to use strcmp() from <string.h> (or make your own function to compare strings)

Answer 2

please put your code on code play ground, so that your code can be review easily
what exactly do you want to get, I can see in your code you're comparing an input with a function which is not possible you can still do something like this if(opp==sum(a,b){ your code;} yeah that will work fine, but your code is not doing lot of things right

Answer 3

Anna ThankYou it Worked ;)

Answer 4

*AsterisK* Not Exactly Comparing function but im checking if the string 'op' is filled with 'sum' the it will call the sum function