Why can i not solve in this way?

#1

here is my code —> https://ide.codingblocks.com/s/450410

#2

@chandreshmaurya you have defined A,a,Z,z as char variable they can’t be used as actual character like ‘A’, while comparing use characters with quotes like if(ch>=‘A’ and ch<=‘Z’) and so.

#3

sir, here is said that don’t use ascii code. is it right to solve with this method ?

#4

yes we are directly using characters not their ascii codes so this is right method.