由#define定义的常量输出

#include <stdio.h>
#define SPEED 55
int main()
{
   printf("Now, the speed limit here is %i.\n",SPEED);
   printf("But I clocked you doin' %i.\n",SPEED+15);
   printf("DIDn't you see that %i MPH sign?\n",SPEED);
   return(0);
}