【正确答案】实验内容
   ②#include"stdio.h"
   main()
   {
   struct person{
   char name[20];
   int age;
   int sex;
   float height;
   }personl;
   printf("please input name:\n");
   scanf("/%s",person1.name);
   printf("please input age:\n");
   scanf("/%d",＆person1.age);
   printf("please input sex(0 for male and 1 for female):\n");
   scanf("/%d",＆person1.sex);
   printf("please input height:\n");
   scanf("/%f",＆person1.height);
   printf("the result is:\n");
   printf("name:/%s\nage:/%d\n",person1.name,person1.age);
   if(person 1.sex==0)
   printf("sex:male\n");
   if(person 1.sex==1)
   printf("sex:female\n");
   printf("height:/%.2fm\n",person 1.height);
   }
   ③#include"stdio.h"
   #include"string.h''
   struct person {
   char name[20];
   int sum;
   };
   main()
   {
   struct person candidate[6]={{"Zhang",0),{"Wang",0},{"Li",0},{"Zhao",0),{"Liu",0},{"Qian",0}};
   int i,j;
   char tname[20];
   for(i=0;i＜500;i++)
   {
   scanf("/%s",tname);
   for(j=0;j＜6;j++)
   if(strcmp(candidate[j].name,tname)==0)
   candidate[j].sum++;
   }
   printf("\n");
   for(j=0;j＜6;j++)
   printf("/%10s:/%d\n",candidate[j]．name,candidate[j]．sum);
   }
   ④#include"stdio.h"
   main()
   {
   enum color{red,green,blue,white};
   enum color i,j,type;
   int loop,count;
   count=0;
   for(i=red;i＜=white;i++)
   for(j=red;j＜=white;j++)
   if(i!=j)
   {
   count++;
   printf("/%-3d",count);
   for(loop=1;loop＜=2;loop++)
   {
   switch(loop){
   case 1:type=i;
   break;
   case 2:type=j;
   break;
   }
   switch(type){
   case red:printf("/%-10s","red");break;
   case green:printf("/%-10s","green");break;
   case blue:printf("/%-10s","blue");break;
   case white:printf("/%-10s","white");break;
   }
   }
   printf("\n");
   }
   printf("\n\ntotal:/%6d\n",count);
   }