A banker has a seif with a cipher. Not to forget the cipher, he wants to write it coded as following: each digit to be replaced with the difference of 9 with the current digit. The banker chose a cipher. Decipher it knowing the cipher starts with a digit different than 9.
I need to write a program that takes the cipher from the keyboard and prints the new cipher.
I thought of the following:
Take the input from the keyboard and put it into a string or an array.
Go through the object with a for and for each digit other than the first, substract it from 9 and add it to another variable.
Print the new variable.
Theoretically I thought of it but I don't know much C. Could you give me any kind of hint, whether I am on the right track or not?
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