My code is not printing anything

#1

my code is not printing anything

#2
#3

sorry i missed your doubt

Your mistake
don’t increase pos like this
genarate_strings(input.substr(1),output,pos++);
here pos will increase after function call complete because it is post increament

never ever pass arguments like this

use this
genarate_strings(input.substr(1),output,pos+1);

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