12-5b.txt

c primer 部分习题答案

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#define NUM 100

int main(void)
{
	int i ,top ,current ,temp;
    int randnum[NUM];
	srand(time(0));
    
    for (i = 0; i < NUM; i++)
        randnum[i] = rand() % 10 + 1;
    puts("Before sort:");

    for (i = 0; i < NUM; i++)
   {
      printf("%2d ", randnum[i]);
      if (i % 10 == 9)
         putchar('\n');
   }
   if (i % 10 != 0)
      putchar('\n');

	for (top = 0; top < NUM -1; top++)
       for (current = top + 1; current < NUM; current++)
            if (randnum[current] > randnum[top])
            {
                 temp = randnum[current];
                 randnum[current] = randnum[top];
                 randnum[top] = temp;
			}

    puts("\nAfter sort:");

    for (i = 0; i < NUM; i++)
   {
      printf("%2d ", randnum[i]);
      if (i % 10 == 9)
         putchar('\n');
   }
   if (i % 10 != 0)
      putchar('\n');
    
    return 0;
}