hurray.c

C.Game.Programming.For.Dummies.原码

#include <stdio.h>
#include <stdlib.h>
#include <time.h>		//for seeding randomizer

#define ELEMENTS 20

int rnd(int range);
void seedrnd(void);

void main()
{
    int blorf[ELEMENTS];
    int x;

/* First pass, fill array with values 1 through 20 */

    printf("Initialize array from 1 to 20:\n");

    for(x=0;x<ELEMENTS;x++)
    {
        blorf[x] = x+1;
        printf("%i\x20",blorf[x]);
    }

/* Second pass, fill array with values 20 through 1 */

    printf("\nAnd now from 20 to 1:\n");

    for(x=0;x<ELEMENTS;x++)
    {
        blorf[x] = 20-x;
        printf("%i\x20",blorf[x]);
    }

/* Final pass, fill array with random values */

    printf("\nAnd now random numbers:\n");

    for(x=0;x<ELEMENTS;x++)
    {
        blorf[x] = rnd(20)+1;
        printf("%i\x20",blorf[x]);
    }

}

int rnd(int range)
{
	int r;

	r=rand()%range;		//spit up random num.
	return(r);
}

void seedrnd(void)
{
	srand((unsigned)time(NULL));
}