C :

#include<stdio.h>
#include<stdlib.h>
#define SIZE 51
int main()
{
	int data[SIZE]={0};
	int index=1;
	int n;
	int i,j,k;
	data[1]=1;
	scanf("%d",&n);
	for(i=1;i<=n;i++)
	{
		for(j=1;j<=index;j++)
		{
			data[j]=data[j]*i;
		}
		for(k=1;k<index;k++)
		{
			if(data[k]>=10)
			{
				data[k+1]=data[k+1]+data[k]/10;
				data[k]=data[k]%10;
			}
		}
		while(data[index]>=10&&index<=SIZE-1)
		{
			data[index+1]=data[index]/10;
			data[index]=data[index]%10;
			index++;
		}
		if(index<=SIZE-1)
		{
			for(j=index;j>0;j--)
			{
				printf("%d",data[j]);
			}
			printf("\n");
		}
		else 
		{
			printf("Over flow!\n");
			exit(1);
		}
	}
	return 0;
}

C++ :

#include<stdio.h>
#include<stdlib.h>
#define SIZE 51
int main()
{
	int data[SIZE]={0};
	int index=1;
	int n;
	int i,j,k;
	data[1]=1;
	scanf("%d",&n);
	for(i=1;i<=n;i++)
	{
		for(j=1;j<=index;j++)
		{
			data[j]=data[j]*i;
		}
		for(k=1;k<index;k++)
		{
			if(data[k]>=10)
			{
				data[k+1]=data[k+1]+data[k]/10;
				data[k]=data[k]%10;
			}
		}
		while(data[index]>=10&&index<=SIZE-1)
		{
			data[index+1]=data[index]/10;
			data[index]=data[index]%10;
			index++;
		}
		if(index<=SIZE-1)
		{
			for(j=index;j>0;j--)
			{
				printf("%d",data[j]);
			}
			printf("\n");
		}
		else 
		{
			printf("Over flow!\n");
			exit(1);
		}
	}
	return 0;
}