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#include"stdio.h" #include"string.h" #include"stdlib.h" #define N 3 #define increase 4 #define NULL 0 typedef struct stud { char name[15]; int age; float score; struct stud *next; }L;/*定义表的类型*/ L*p,*that,*othernew,*x,*you,*head; L * enter_record ()/*加入记录*/ { int n,i=0; float m; L *new; head=new=(L*)malloc(N*sizeof(L)); if(!new) { printf("failure for applying room!n"); exit(0); } else { p=new; while(i<N) { i++; printf("please enter name:"); fflush(stdin); gets(p->name); printf("n"); printf("enter age:"); fflush(stdin); scanf("%d",&n); printf("n"); p->age=n; printf("enter the score:"); fflush(stdin); scanf("%f",&m); p->score=m; p=p->next; } } return head; } L *show_record()/*显示记录*/ { int c=1; L *this; printf("the records are:n"); this=head; while(this->next!=NULL) { printf("the %d th is:n"); printf("the name is:%sn",this->name); printf("the age is:%dn",this->age); printf("the score is:%fn"); this=this->next; c++; } printf("the number of records is:%d",c); return head; } L *delete_record()/*删除记录*/ { int d; printf("which one record do you want to delete?number:"); fflush(stdin); scanf("%d",&d); printf("n"); if(d>N-1||d<0) { printf("error due to the wrong input!n"); exit(0); } else { int e=1; that=head; while(that->next!=NULL&&e<d) { that=that->next; e++; } that->next=that->next->next; free(that->next); printf("the record has been deleted!n"); } return head; } L * insert_record()/*加入新的记录*/ { int y; printf("where will you insert the new record?number:"); fflush(stdin); scanf("%d",&y); printf("n"); if(y>=1&&y<=N) { int z=1,g,h; x=head; while(x->next!=NULL&&z<=N) { z++; x=x->next; } othernew=(L*)malloc(sizeof(L)); x->next=othernew; othernew=x->next->next; printf("please input the name new record:%sn",othernew->name); scanf("%d",&g); printf("enter the age:%dn",g); scanf("%d", |