Question

I have trouble writing a recursive function in C:

void func(int n)

which for a given number n prints “1” and n zeroes after it.

for example:

func(3);

prints: 1000

func(5);

prints: 100000

No global variables (outside the function) are allowed and argument count must not be increased. No other helper functions allowed.

Answer 1

#include <stdio.h>

void func(int k){
  if(k==0){
    printf("1");
    return;
  }
  func(k-1);
  printf("0");
}

int main(){
  func(3);
  return 0;
}