123.c

适合于初学者的C程序

/* Note:Your choice is C IDE */
#include "stdio.h"
main()
{   char max,next;
	int i;
	for(max='1';max<='9';max++)
	for(i=1;i<=20-(max-'0');++i)
	printf(" ");
	for(next='1';next<=max;next++)
	printf("%c",next);
	for(next=max-1;next>='1';next--)
	printf("%c",next);
	printf("\n");
    
}