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题目描述：

代码：

#include <iostream>

#include <string.h>

using namespace std;

struct student

{

int number;

char name[20];

student *next;

};

student *createlist(int n)

{

int i;

student *head=NULL;

student *p=NULL;

head=new student;

head->next=NULL;

p=head;

cin>>p->number>>p->name;

for(i=1;i<n;i++)

{

p->next=new student;

p=p->next;

p->next=NULL;

cin>>p->number>>p->name;

}

return head;

}

void searchstu(student *head,char *str)

{

student *current;

current=head;

while(current!=NULL)

{

if(!strcmp(current->name,str))

{

cout<<current->number<<endl;

break;

}

else

current=current->next;

}

}

void destroy(student *head)

{

student *p;

p=head;

while(head!=NULL)

{

p=head;

head=head->next;

delete p;

}

}

int main()

{

int n;

char str[20];

student *head;

cin>>n;

head=createlist(n);

cin>>str;

searchstu(head,str);

destroy(head);

return 0;

}

结果展示：