I can't pass 1 test case

#1
#2

Hey @haseebshaik00 you are not passing single test case because it consist of zero digit also. As it’s not mentioned in the question(fault by problem setter) . When you encountered 0 , you have to add a space just like you did for when you get 1. Right now you are just avoiding and not adding anything .
int digit=in[i]-‘0’;

if(digit==0)

{

   Keypad(in,out,i+1,j);

}

#3

Take this code for reference https://ide.codingblocks.com/s/336704

#4

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