学生成绩管理系统.zip

#include <iostream> #include <fstream> using namespace std; #include <stdio.h> #include <stdlib.h> #include <string.h> void fprint(int score[],long num[],char name[][10]); //打印文件函数 int read(int score[],long num[],char name[][10]);/*定义输入函数*/ void sums(int *sum,float *aver,int score[],int n);/*求和函数*/ void print(long num[],int score[],int n,char name[][10]);/*输出函数*/ void paixu(int n,long num[],int score[],int (*compare)(int a,int b),char name[][10]); /*排序函数*/ int ascending(int a,int b);/*升序*/ int descending(int a,int b);/*降序*/ void paixus(int n,long num[],int score[],int (*compare)(int a,int b),char name[][10]); /*学号排序函数*/ void research(long num[],int score[],int n,long x,char name[][10]); /*查找函数*/ void tongji(int score[],int n); /*统计五个等级函数*/ void namesort(char name[][10],int n,long num[],int score[]); void nameresearch(long num[],int score[],char research1[],char name[][10],int n); int main() { int n,n1,score[50]; long num[50],x; /*定义学号成绩*/ char name[50][10],research1[10]; int sum=0;float aver=0; /*定义求和与平均分*/ printf("---------------------------------------输入学生学号、姓名和成绩（当输入错误格式时停止输入）---------------------------\n"); /*输入学号成绩*/ n=read(score,num,name); printf("***********************************1、录入每个学生的学号和考试成绩到文件student.file中*********************************\n***********************************2、计算课程的总分和平均分**********************************************************\n***********************************3、按成绩由高到低排出名次表*********************************************************\n***********************************4、按成绩由低到高排出成绩表*********************************************************\n***********************************5、按学号由小到大排出成绩表*********************************************************\n***********************************6、按学号查询学生排名及考试成绩****************************************************\n***********************************7、统计优秀（90-100）、良好（80-90）、中等（70-80）、及格（60-70）、不及格（60以下）************************************* 各阶段的人数以及所占百分比*******************************************************\n***********************************8、输出每个学生的姓名、学号、考试成绩以及课程总分和平均分***************************\n***********************************9、按姓名的字典顺序排出成绩表*******************************************************\n**********************************10、按学生姓名查询排名及考试成绩******************************************************"); p:printf("\n\n\n-----------------------------------------输入想要的指令(按数字)---------------------------------\n"); scanf("%d",&n1); /*选择想要的选项*/ switch(n1) {case 1:fprint(score,num,name);goto p;break; case 2:sums(&sum,&aver,score,n);printf("sum=%d,aver=%f",sum,aver);goto p;break; case 3:paixu(n,num,score,descending,name);print(num,score,n,name);goto p;break; case 4:paixu(n,num,score,ascending,name);print(num,score,n,name);goto p;break; case 5:paixus(n,num,score,ascending,name);print(num,score,n,name);goto p;break; case 6:paixus(n,num,score,ascending,name);printf("输入要查找的学号\n");scanf("%ld",&x);research(num,score,n,x,name);goto p;break; case 7:tongji(score,n);goto p;break; case 8:paixus(n,num,score,ascending,name);print(num,score,n,name);printf("sum=%d,aver=%f",sum,aver);goto p;break; case 9:namesort(name,n,num,score);print(num,score,n,name);goto p;break; case 10:printf("输入要查找的姓名：");scanf("%s",research1);nameresearch(num,score,research1,name,n);goto p;break; default: printf("错误"); } system("pause"); return 0; } void fprint(int score[],long num[],char name[][10]) { int i=0; ofstream outfile("studentfile",ios::out); if(!outfile) { cerr<<"open error!"<<endl; exit(1); } outfile<<"学号"<<" "<<"姓名"<<" "<<"成绩"<<endl; do { outfile<<num[i]<<" "<<name[i]<<" "<<score[i]<<endl; i++; }while(num[i]!=-1); outfile.close(); cout<<"录入完成"<<endl; } int read(int score[],long num[],char name[][10])/*输入函数*/ { int i=-1; printf("学号\t姓名\t成绩\n"); do{ i++; scanf("%ld%s%d",&num[i],&name[i],&score[i]); }while(num[i]>0&&score[i]>0&&score[i]<101&&name[i]>0); return i; } void sums(int *sum,float *aver,int score[],int n) /*求和函数*/ { for(int i=0;i<n;i++) { *sum=*sum+score[i]; } *aver=(float)*sum/n; } void print(long num[],int score[],int n,char name[][10]) /*打印函数*/ { printf("学号\t姓名\t成绩\n"); for(int i=0;i<n;i++) printf("%ld\t%s\t%d\n",num[i],name[i],score[i]); } void paixu(int n,long num[],int score[],int (*compare)(int a,int b),char name[][10]) /*成绩排序函数*/ { int t2;long t1;char temp[10]; for(int i=0;i<n-1;i++) { for(int j=i+1;j<n;j++) { if((*compare)(score[j],score[i])) {t1=num[j];num[j]=num[i];num[i]=t1; t2=score[j];score[j]=score[i];score[i]=t2; strcpy(temp,name[i]); strcpy(name[i],name[j]); strcpy(name[j],temp); } } } } int ascending(int a,int b)/*升序*/ { return a<b; } int descending(int a,int b)/*降序*/ { return a>b; } void paixus(int n,long num[],int score[],int (*compare)(int a,int b),char name[][10]) /*学号排序函数*/ { int t2;long t1;char temp[10]; for(int i=0;i<n-1;i++) { for(int j=i+1;j<n;j++) { if((*compare)(num[j],num[i])) {t1=num[j];num[j]=num[i];num[i]=t1; t2=score[j];score[j]=score[i];score[i]=t2; strcpy(temp,name[i]); strcpy(name[i],name[j]); strcpy(name[j],temp); } } } } void research(long num[],int score[],int n,long x,char name[][10]) /*学号查找函数*/ { int low=0,heigh=n-1,mid; while(low<=heigh) {mid=low+(heigh-low)/2; if(x>num[mid]) low=mid+1; else if(x<num[mid]) heigh=mid-1; else { printf("学号\t姓名\t成绩\n"); printf("%ld\t%s\t%d",num[mid],name[mid],score[mid]);goto a;} } printf("未找到"); a: ; } void tongji(int score[],int n) /*统计五个等级函数*/ { int count[5]={0,0,0,0,0}; for(int i=0;i<n;i++) {switch(score[i]/10) {case 9:count[0]=count[0]+1;break; case 8:count[1]=count[1]+1;break; case 7:count[2]=count[2]+1;break; case 6:count[3]=count[3]+1;break; case 5: case 4: case 3: case 2: case 1: case 0:count[4]=count[4]+1;break; } } printf("优秀：%.2f%%良好：%.2f%%中等：%.2f%%及格：%.2f%%不及格：%.2f%%",(float)count[0]/n*100,(float)count[1]/n*100,(float)count[2]/n*100,(float)count[3]/n*100,(float)count[4]/n*100); } void namesort(char name[][10],int n,long num[],int score[])/*姓名排序函数*/ { char temp[10];int t2;long t1; for(int i=0;i<n-1;i++) {for(int j=i+1;j<n;j++) {if(strcmp(name[j],name[i])<0) {strcpy(temp,name[i]); strcpy(name[i],name[j]); strcpy(name[j],temp); t1=num[j];num[j]=num[i];num[i]=t1; t2=score[j];score[j]=score[i];score[i]=t2; } } } } void nameresearch(long num[],int score[],char research1[],char name[][10],int n)/*姓名查找函数*/ { int i=-1; do{i++; }while(strcmp(research1,name[i])!=0); printf("%ld\t%s\t%d\n",num[i],name[i],score[i]); }