#include<stdio.h>
#include<string.h>
int main()
{
     int   a[1000],b[1000],c[1000];
     int   i,j,k,n,m,w,p,g;
     while(scanf("%d%d",&m,&n)!=EOF)
     {
         for(i=0;i<m;i++)
         {
             scanf("%d",&a[i]);
         }
         for(i=0;i<n;i++)
         {
             scanf("%d",&b[i]);
         }
         w=0;p=0;k=0;
         for(i=0;i<m;i++)
         {   
             for(j=0;j<n;j++)
             {
                 if(a[i]!=b[j])  k++;
                 if(a[i]==b[j])  w++;
             }
             if(k==n) {c[p]=a[i];p++;}
         }
         if(w==m)  printf("NULL");
         else {       for(i=0;i<p-1;i++)
                      {
                          for(j=0;j<p-1-i;j++)
                          {
                              if(c[j]>c[j+1])  {g=c[j];c[j]=c[j+1];c[j+1]=g;}
                          }
                        }
                        for(i=0;i<p;i++)
                        {
                            printf("%d ",c[i]);
                        }
              }
         printf("\n");
     }
     return 0;}
 1. if(k==n) {c[p]=a[i];p++;}这句话是什么意思？  2 else {       for(i=0;i<p-1;i++)
                      {
                          for(j=0;j<p-1-i;j++)
                          {
                              if(c[j]>c[j+1])  {g=c[j];c[j]=c[j+1];c[j+1]=g;}
                          }
                        }
                        这段代码的意思是什么？
3.怎样学好C语言？ 通过视频还是书？求推荐！！！总觉得有好多东西都不清楚

[此贴子已经被作者于2016-12-5 20:22编辑过]