int main()
{
    printf("                              1.Input\n");
    printf("                              2.Output\n");
    printf("                              3.Order\n");
    printf("                              4.Quit\n");
    char c;
    scanf("%c",&c);
    if(c=='i'){printf("You are trying to Input info:\n");}
    if(c=='o'){printf("You are trying to Output info");}
    if(c=='m'){printf("You are trying to Make things ordered");}
    if(c=='q'){printf("You are about to Quit");}
    if(c!='i'&&c!='o'&&c!='m'&&c!='q'){printf("Wrong input");}
struct student{
    int study;
    float math;
    float physics;
    float English;
    float all;
}student1,student2,student3;
if(c=='i'){
    scanf("%d%f%f%f ",&student1.study,&student1.math,&student1.physics,&student1.English);
scanf("%d%f%f%f ",&student2.study,&student2.math,&student2.physics,&student2.English);
scanf("%d%f%f%f",&student3.study,&student3.math,&student3.physics,&student3.English);}
student1.all=student1.math+student1.physics+student1.English;
student2.all=student2.math+student2.physics+student2.English;
student3.all=student3.math+student3.physics+student3.English;
float*s1;float*s2;float*s3;
s1=&student1.all;
s2=&student2.all;
s3=&student3.all;
float ping=(*s1+*s2+*s3)/3;
float two;
float max(float*k1,float*k2,float*k3);//比较三者
float max2(float*k1,float*k2);//比较二者
float z=max(s1,s2,s3);
if(z==*s1){
 printf("%d,%2.1f,%2.1f,%2.1f,%2.1f,%2.1f\n",student1.study,student1.all,ping,student1.math,student1.physics,student1.English);
 two=max2(s2,s3);
 if(two==*s2){
     printf("%d,%2.1f,%2.1f,%2.1f,%2.1f,%2.1f\n",student2.study,student2.all,ping,student2.math,student2.physics,student2.English);
     printf("%d,%2.1f,%2.1f,%2.1f,%2.1f,%2.1f\n",student3.study,student3.all,ping,student3.math,student3.physics,student3.English);
 }
 else{
      printf("%d,%2.1f,%2.1f,%2.1f,%2.1f,%2.1f\n",student3.study,student3.all,ping,student3.math,student3.physics,student3.English);
      printf("%d,%2.1f,%2.1f,%2.1f,%2.1f,%2.1f\n",student2.study,student2.all,ping,student2.math,student2.physics,student2.English);
};
}
if(z==*s2){
     printf("%d,%2.1f,%2.1f,%2.1f,%2.1f,%2.1f\n",student2.study,student2.all,ping,student2.math,student2.physics,student2.English);
     two=max2(s1,s3);
     if(two==*s1){
          printf("%d,%2.1f,%2.1f,%2.1f,%2.1f,%2.1f\n",student1.study,student1.all,ping,student1.math,student1.physics,student1.English);
          printf("%d,%2.1f,%2.1f,%2.1f,%2.1f,%2.1f\n",student3.study,student3.all,ping,student3.math,student3.physics,student3.English);
     }
     else{
          printf("%d,%2.1f,%2.1f,%2.1f,%2.1f,%2.1f\n",student3.study,student3.all,ping,student3.math,student3.physics,student3.English);
           printf("%d,%2.1f,%2.1f,%2.1f,%2.1f,%2.1f\n",student1.study,student1.all,ping,student1.math,student1.physics,student1.English);
     };
}
if(z==*s3){
     printf("%d,%2.1f,%2.1f,%2.1f,%2.1f,%2.1f\n",student3.study,student3.all,ping,student3.math,student3.physics,student3.English);
     two=max2(s2,s1);
     if(two==*s1){
         printf("%d,%2.1f,%2.1f,%2.1f,%2.1f,%2.1f\n",student1.study,student1.all,ping,student1.math,student1.physics,student1.English);
         printf("%d,%2.1f,%2.1f,%2.1f,%2.1f,%2.1f\n",student2.study,student2.all,ping,student2.math,student2.physics,student2.English);
     }
     else{
         printf("%d,%2.1f,%2.1f,%2.1f,%2.1f,%2.1f\n",student2.study,student2.all,ping,student2.math,student2.physics,student2.English);
          printf("%d,%2.1f,%2.1f,%2.1f,%2.1f,%2.1f\n",student1.study,student1.all,ping,student1.math,student1.physics,student1.English);
     };
}
return 0;
}
 float max(float*k1,float*k2,float*k3)
{
    float l;
    if(*k1>*k2&&*k1>*k3){l=*k1;}
    if(*k2>*k3&&*k2>*k1){l=*k2;}
    if(*k3>*k1&&*k3>*k2){l=*k3;}
    return(l);
}
float max2(float *k1,float *k2)
{
    float l;
    if(*k1>*k2){l=*k1;}
    if(*k2>*k1){l=*k2;}
    return(l);
}