Function call each other

  
#include <stdio.h>

void f2(int b);
void f1(int a);

int main(void)
{
  f1(30);

  return 0;
}

void f1(int a)
{
  if( a ) 
      f2( a - 1 );
  printf("%d ", a);
}

void f2(int b)
{
  printf(" . ");
  if(b) 
      f1( b - 1 );
}

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Function call each other : Function « Function « C / ANSI-C

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