parent
7517a3bed1
commit
320ec0bf9b
@ -0,0 +1,264 @@
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#include <stdio.h>
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#include <string.h>
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struct Student//定义学生结构体
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{
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char id[20];
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char name[20];
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int class;
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double score1;
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double score2;
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double score3;
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double score;
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}student[10];
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int numstudents=0;
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void PrintMenu()//打印菜单以供选择
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{
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printf(" 1.input\n");
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printf(" 2.delete\n");
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printf(" 3.select\n");
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printf(" 4.order\n");
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printf(" 5.output\n");
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printf(" 6.update\n");
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printf(" 7.quit\n");
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}
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void Input()//输入学生信息
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{
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char a;
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do
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{
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printf("Please input information:\n");
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scanf("%s",&student[numstudents].id);
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scanf("%s",&student[numstudents].name);
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scanf("%d",&student[numstudents].class);
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scanf("%lf",&student[numstudents].score1);
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scanf("%lf",&student[numstudents].score2);
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scanf("%lf",&student[numstudents].score3);
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student[numstudents].score=student[numstudents].score1+student[numstudents].score2+student[numstudents].score3;
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numstudents++;
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printf("continue?(y or n)");//选择是否要继续输入学生信息
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fflush(stdin);
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scanf("%c",&a);
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}while(a=='y');
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}
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void Printinformation()//打印学生信息
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{
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for(int i=0;i<numstudents;i++)
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{
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printf("学号:%s,姓名:%s,班级:%d,成绩1:%lf,成绩2:%lf,成绩3:%lf,总成绩:%lf\n",student[i].id,student[i].name,student[i].class,student[i].score1,student[i].score2,student[i].score3,student[i].score);
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}
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}
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void Delete()//删除学生信息
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{
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char a;
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do
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{
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int choice;
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printf("delete by?\n1.id\n2.name\n");//询问用什么方式选中要删除的学生
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scanf("%d",&choice);
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if(choice==1)
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{
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char cid[20]={0};
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printf("请输入学号:\n");
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scanf("%s",&cid);
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int i;
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for( i=0;i<numstudents;i++)
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{
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if(strcmp(student[i].id,cid)==0)
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{
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for(int j=i;j<numstudents;j++)
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{
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student[j]=student[j+1];
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}
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numstudents--;
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printf("已删除！\n");
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break;
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}
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if(i==numstudents-1)
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{
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printf("未找到该学生信息！\n");
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}
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}
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}
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else if(choice==2)
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{
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char cname[20]={0};
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printf("请输入姓名:\n");
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scanf("%s",&cname);
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int i;
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for( i=0;i<numstudents;i++)
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{
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if(strcmp(student[i].name,cname)==0)
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{
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for(int j=i;j<numstudents;j++)
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{
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student[j]=student[j+1];
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}
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numstudents--;
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printf("已删除！\n");
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break;
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}
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if(i==numstudents-1)
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{
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printf("未找到该学生信息！\n");
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}
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}
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}
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Printinformation();
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printf("continue?(y or n)\n");
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fflush(stdin);
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scanf("%c",&a);//询问是否继续
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}while(a=='y');
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}
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void Select()//查询学生信息
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{
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char a;
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do
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{
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printf("search by?\n1.id\n2.name\n3.class\n");//询问以什么方式检索学生信息
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int choice;
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scanf("%d",&choice);
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if(choice==1)
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{
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char sid[20]={0};
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printf("请输入查询学生学号:\n");
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scanf("%s",&sid);
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for(int i=0;i<numstudents;i++)
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{
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if(strcmp(student[i].id,sid)==0)
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{
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printf("学号:%s,姓名:%s,班级:%d,成绩1:%lf,成绩2:%lf,成绩3:%lf,总成绩:%lf\n",student[i].id,student[i].name,student[i].class,student[i].score1,student[i].score2,student[i].score3,student[i].score);
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}
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}
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}
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else if(choice==2)
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{
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char sname[20]={0};
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printf("请输入查询学生姓名:\n");
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scanf("%s",&sname);
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for(int i=0;i<numstudents;i++)
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{
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if(strcmp(student[i].name,sname)==0)
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{
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printf("学号:%s,姓名:%s,班级:%d,成绩1:%lf,成绩2:%lf,成绩3:%lf,总成绩:%lf\n",student[i].id,student[i].name,student[i].class,student[i].score1,student[i].score2,student[i].score3,student[i].score);
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}
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}
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}
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else if(choice==3)
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{
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int sclass;
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printf("请输入查询学生班级:\n");
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scanf("%d",&sclass);
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for(int i=0;i<numstudents;i++)
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{
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if(sclass==student[i].class)
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{
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printf("学号:%s,姓名:%s,班级:%d,成绩1:%lf,成绩2:%lf,成绩3:%lf,总成绩:%lf\n",student[i].id,student[i].name,student[i].class,student[i].score1,student[i].score2,student[i].score3,student[i].score);
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}
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}
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}
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printf("continue?(y or n)\n");
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fflush(stdin);
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scanf("%c",&a);
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} while(a=='y');
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}
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void Order()//将学生信息按照班级以及成绩排序
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{
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struct Student temp;
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for(int i=0;i<numstudents-1;i++)//将学生按照班级排序
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{
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for(int j=0;j<numstudents-1-i;j++)
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{
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if(student[j].class>student[j+1].class)
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{
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temp=student[j];
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student[j]=student[j+1];
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student[j+1]=temp;
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}
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}
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}
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int start=0;//将按照班级排好序的学生按照成绩在班级内部排序
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for(int i=0;i<numstudents-1;i++)
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{
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if(student[i].class != student[i+1].class)
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{
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int end=i;
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for (int k=start;k<end;k++)
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{
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for(int l=start;l<end-k;l++)
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{
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if(student[l].score<student[l+1].score)
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{
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temp=student[l];
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student[l]=student[l+1];
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student[l+1]=temp;
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}
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}
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}
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start=i+1;
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}
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}
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Printinformation();
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}
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void Update()//修改学生信息
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{
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char a;
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do
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{
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printf("请输入修改学生学号:\n");
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char choice[20]={0};
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scanf("%s",&choice);
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for(int i=0;i<numstudents;i++)
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{
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if(strcmp(student[i].id,choice)==0)
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{
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printf("请输入修改后的学号,姓名,班级,成绩1,成绩2,成绩3\n");
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scanf("%s",&student[i].id);
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scanf("%s",&student[i].name);
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scanf("%d",&student[i].class);
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scanf("%lf",&student[i].score1);
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scanf("%lf",&student[i].score2);
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scanf("%lf",&student[i].score3);
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student[i].score=student[i].score1+student[i].score2+student[i].score3;
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}
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}
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Printinformation();
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printf("continue(y or n)?\n");
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fflush(stdin);
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scanf("%c",&a);
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} while (a=='y');
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}
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void Run()
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{
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int choice;
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do
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{
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PrintMenu();
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printf("please input your option\n");
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scanf("%d",&choice);
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switch(choice)
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{
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case 1:Input();break;
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case 2:Delete();break;
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case 3:Select();break;
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case 4:Order();break;
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case 5:Printinformation();break;
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case 6:Update();break;
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case 7:printf("thanks for using!");break;
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default:printf("Wrong Input!\n");
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}
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}while(choice!=7);
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}
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int main()
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{
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PrintMenu();
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Run();
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return 0;
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}
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