การเขียนโปรแกรม3

2.

2.1 (rep20.CPP)
#include
#include
void main()
{
int n,i;
clrscr();
printf("num:");scanf("%d",&n);
for(i=1;i<=n;i++)
{printf("%d\t",i);}
getch();
}

2.2 (repeven.CPP)
#include
#include
void main()
{
int n,i;
clrscr();
printf("num=:");scanf("%d",&n);
for (i=2;i<=n; i+=2)
{printf("%d\t",i);}
printf("\n-----------------end of file--------------------");
getch();
}