程序设计

3实训过程1.2.主要程序代码：#include<stdio.h>#include<stdlib.h>#include<string.h>#define N 2struct Student{int num;char name[20];char sex[4];int age;float score[4];float aver;float ascore;}stu[N+1];void put(){printf("---------------------------------------------------------------------------\n");printf("num name sex age score aver a score\n");} void save()//将数据输出到文件夹内{FILE *fp;//定义文件指针int i;if((fp=fopen("student.dat","wb"))==NULL)//打开输出文件student.dat{printf("cannot open file\n");return;}for(i=0;i<N+1;i++)if(fwrite(&stu[i],sizeof(struct Student),1,fp)!=1) //用二进制方式写入数据printf("file write error\n");fclose(fp);}void input() //输入函数{int i;put();for(i=0;i<N;i++){scanf("%d %s %s %d %f %f %f %f",&stu[i].num,stu[i].name,stu[i].sex,&stu[i].age,&stu[i].score[0],&stu[i].score[1],&stu[i].score[2],&stu[i].score[3]);stu[i].ascore =stu[i].score[0]+stu[i].score[1]+stu[i].score[2]+stu[i].score[3];stu[i].aver =stu[i].ascore /4;}save();}void insert() //插入函数{ void output(int x);struct Student t;int i,j;FILE *fp;printf("insert data:\n");/*请输入一个数据*/put();scanf("%d %s %s %d %f %f %f %f",&stu[N].num,stu[N].name,stu[N].sex,&stu[N].age,&stu[N].score[0],&stu[N].score[1],&stu[N].score[2],&stu[N].score[3]);stu[N].ascore=stu[N].score[0]+stu[N].score[1]+stu[N].score[2]+stu[N].score[3];stu[N].aver =stu[N].ascore /4;if((fp=fopen("student.dat","a"))==NULL)//打开输出文件student.dat {printf("cannot open file\n");return;}if(fwrite(&stu[N],sizeof(struct Student),1,fp)!=1)printf("file write error\n");fclose(fp);/*将输入的数字按顺序插入数列中*/for(j=0;j<(N);j++)/*冒泡法排序*/for(i=0;i<(N-j);i++)if(stu[i].num>stu[i+1].num){t=stu[i];stu[i]=stu[i+1];stu[i+1]=t;}save();output(N+1);}void sort()//排序函数{void output();int i,j,m;struct Student t;printf("请选择排序方法1为学号2为总成绩：\n");scanf("%d",&m);if(m==1){for(j=0;j<(N-1);j++)for(i=0;i<(N-1-j);i++)if(stu[i].num>stu[i+1].num){t=stu[i];stu[i]=stu[i+1];stu[i+1]=t;}save();output(N);}else{for(j=0;j<(N-1);j++)for(i=0;i<(N-1-j);i++)if(stu[i].ascore <stu[i+1].ascore ){t=stu[i];stu[i]=stu[i+1];stu[i+1]=t;}save();output(N);}}void find()//查找函数{int n,num,i;char name[20];printf("按学号查找选择1，按姓名查找选择2\n");scanf("%d",&n);if(n==1){printf("请输入学号：");scanf("%d",&num);for(i=0;i<N;i++)if(num==stu[i].num)printf("%-d\t%s\t%s\t%d\t%.2f\t%.2f\t%.2f\t%.2f\t%.2f\t%.2f\n",stu[i].num,stu[i] .name,stu[i].sex,stu[i].age,stu[i].score[0],stu[i].score[1],stu[i].score[2],stu[i].score[3],stu[i].aver,stu[i].ascore);elseif(i>=N)printf("没找到该学生，请重新输入\n");}else{ printf("请输入姓名：");scanf("%s",name);for(i=0;i<N;i++)if(strcmp(name,stu[i].name)==0)printf("%-d\t%s\t%s\t%d\t%.2f\t%.2f\t%.2f\t%.2f\t%.2f\t%.2f\n",stu[i].num,stu[i] .name,stu[i].sex,stu[i].age,stu[i].score[0],stu[i].score[1],stu[i].score[2],stu[i].score[3],stu[i].aver,stu[i].ascore);elseif(i>=N)printf("没找到该学生，请重新输入\n");}}void delete()//删除函数{int n,num,i;char name[20];printf("按学号删除选择1，按姓名删除选择2\n");scanf("%d",&n);{printf("请输入学号：");scanf("%d",&num);for(i=0;i<N;i++)if(num==stu[i].num)for(;i<N;i++)stu[i]=stu[i+1];elseif(i>=N)printf("未查到该学生，请重新输入\n");for(i=0;i<N-1;i++)printf("%-d\t%s\t%s\t%d\t%.2f\t%.2f\t%.2f\t%.2f\t%.2f\t%.2f\n",stu[i].num,stu[i] .name,stu[i].sex,stu[i].age,stu[i].score[0],stu[i].score[1],stu[i].score[2],stu[i].score[3],stu[i].aver,stu[i].ascore);}else{ printf("请输入姓名：");scanf("%s",name);for(i=0;i<N;i++)if(strcmp(name,stu[i].name)==0)for(;i<N;i++)stu[i]=stu[i+1];elseif(i>=N)printf("未查到该学生，请重新输入\n");for(i=0;i<N-1;i++)printf("%-d\t%s\t%s\t%d\t%.2f\t%.2f\t%.2f\t%.2f\t%.2f\t%.2f\n",stu[i].num,stu[i] .name,stu[i].sex,stu[i].age,stu[i].score[0],stu[i].score[1],stu[i].score[2],stu[i].score[3],stu[i].aver,stu[i].ascore);}}void output(int x)//输出函数{FILE *fp; //定义文件指针int i;if((fp=fopen("student.dat","rb"))==NULL){printf("cannot open file\n");}put();for(i=0;i<x;i++){fread(&stu[i],sizeof(struct Student),1,fp);//从fp指向的文件读入一组数据printf("%-d\t%s\t%s\t%d\t%.2f\t%.2f\t%.2f\t%.2f\t%.2f\t%.2f\n",stu[i].num,stu[i] .name,stu[i].sex,stu[i].age,stu[i].score[0],stu[i].score[1],stu[i].score[2],stu[i].score[3],stu[i].aver,stu[i].ascore);}//在屏幕上输出这组数据fclose(fp);//关闭文件“student.dat”}void quit()//结束函数{exit(0);}void massage()//输出菜单函数{printf("*******************************************\n");printf(" | 学生管理系统| *\n");printf(" 1:input *\n");printf(" 2:insert *\n");printf(" 3:sort *\n");printf(" 4:find *\n");printf(" 5:delete *\n");printf(" 6:output *\n");printf(" 7:quit *\n");printf("*******************************************\n");}int main(){int num;while(num<7){massage();printf("please choose: \n");scanf("%d",&num);switch(num){case 1:input();break;case 2:insert();break;case 3:sort();break;case 4:find();break;case 5:delete();break;case 6:output(N);break;case 7: quit();break;}}return 0;}3.运行结果：心得：这是我做的最后一个项目，结合的项目一到项目六，这是对我们一个全面的考察，从这些项目中，让我们认识到程序中互相的关联。