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#include <stdio.h>
 
int loop_down_to_zero(int i);
int loop_up_to_int(int i);
 
int main(int argc, char* argv[])
{
	int i;
	printf("Please enter in a positive int: %d");
	scanf("%d", &i);
 
	loop_down_to_zero(i);
	loop_up_to_int(i);
 
	return 0;
}
 
void loop_down_to_zero(int i)
{
	while(i >= 0)
	{
		printf("%d\n", i);
		i--;
	}
}
 
void loop_up_to_int(int i)
{
	j = 0
	while(j <= i)
	{
		printf("%d\n", j);
		j++;
	}
}

prog.c: In function 'main':
prog.c:9:9: warning: format '%d' expects a matching 'int' argument [-Wformat=]
  printf("Please enter in a positive int: %d");
         ^
prog.c: At top level:
prog.c:18:6: error: conflicting types for 'loop_down_to_zero'
 void loop_down_to_zero(int i)
      ^
prog.c:3:5: note: previous declaration of 'loop_down_to_zero' was here
 int loop_down_to_zero(int i);
     ^
prog.c:27:6: error: conflicting types for 'loop_up_to_int'
 void loop_up_to_int(int i)
      ^
prog.c:4:5: note: previous declaration of 'loop_up_to_int' was here
 int loop_up_to_int(int i);
     ^
prog.c: In function 'loop_up_to_int':
prog.c:29:2: error: 'j' undeclared (first use in this function)
  j = 0
  ^
prog.c:29:2: note: each undeclared identifier is reported only once for each function it appears in
prog.c:30:2: error: expected ';' before 'while'
  while(j <= i)
  ^

Standard output is empty