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printAllDecimal

Language/Type: C++ backtracking recursion

Write a recursive function named printAllDecimal that accepts an integer number of digits and prints all base-10 numbers that have exactly that many digits, in ascending order, one per line, with leading zeros in front as needed. For example, the call of printAllDecimal(3); should print: 

000
001
002
003
...
998
999

If the number of digits passed is 0 or negative, print no output. Your function must use recursion, but you can use a single for loop if necessary.

Function: Write a C++ function as described, not a complete program.

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