Logic to solve the qstn

#1

Pls can I get some hint to solve the qstn

#2

hi @Senjuti256 have you solved the question given before this…smart keypad?

#3

Yes I have solved but over here how to check which strings have characters from the string formed by combination?

#4

Hi @Senjuti256 you can use the string.find() function to do so, see the documentation for return type and more info!

#5

where is the documentation?

#6

@Senjuti256 http://www.cplusplus.com/reference/string/string/find/

#7

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