gcc...

#include <stdio.h>
#include <stdlib.h>
int main(void)
{
	int scf;
	scanf("%d",scf);
	int *ptr = (int*)malloc(sizeof(int)*scf);
	int num3=0;
	for(int num1=1;num1<scf;num1++)
	{
		for(int num2;num2<num1;num2++)
		{
			if(num1 == 1)
			goto PLUS;
			else if(num2 == 1)
			continue;
			else if(num2==num1)
			{
				printf("%d 은 소수입니다",num1);
				num3++;
				ptr[num3-1]=num1
				goto PLUS;
			}
			else if(num1%num2 == 0)
			goto PLUS;
		}
	PLUS:
	}
        free(ptr);
	return 0;
}