C语言 苏小红 第五版 十三章实验题答案

C语言 苏小红 第五版 十三章实验题答案

#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#define N 30
#define MAX_LEN 10
#define M 3
typedef struct student
{
long studentID;
char studentName[10];
int score[3];
}STUDENT;
void InputScore(STUDENT stu[],int n);
void SumforCorse(STUDENT stu[],int n,float sumcorse[],float avercorse[]);
void SumforStudent(STUDENT stu[],int n,float sumstudent[],float averstudent[]);
void DateScore(STUDENT stu[],int n,int (*compare)(int a,int b));
void DateNum(STUDENT stu[],int n);
void DateName(STUDENT stu[],int n);
int LinSearch(STUDENT stu[],long x,int n);
int LinSearchname(STUDENT stu[],char name[],int n);
void RateScore(STUDENT stu[],int n);
void PrintfScoreNum(STUDENT stu[],int n,float sumcorse[],float avercorse[]);
void Printf(STUDENT stu[],int n);
void Swapnum(long *a,long *b);
void Swapsum(int*a,int *b);
void Swapscore(int *a,int *b);
int Ascending(int a,int b);
int Descending(int a,int b);
void WritetoFile(STUDENT stu[],int n);
int ReadfromFILE(STUDENT stu[]);
main()
{int n,m,pos=0,i;
long x=0;
float avercorse[3]={0},averstudent[N]={0},sumcorse[3]={0},sumstudent[N]={0};
char name[MAX_LEN];
STUDENT stu[N];
printf("how many student?");
scanf("%d",&n);
InputScore(stu,n);
printf("计算每门课程的总分和平均分输入1\n");
printf("计算每个学生的总分和平均分输入2\n");
printf("按每个学生的总分由高到低输入3\n");
printf("按照每个学生的总分由低到高输入4\n");
printf("学号有小到大排出成绩表输入5\n");
printf("按姓名在字典中的排序输入6\n");
printf("按学号查询学生排名及各科考试成绩比输入7\n");
printf("按姓名查询学生排名及各科考试成绩比输入8\n");
printf("按成绩百分比输入9\n");
printf("输出每个学生的学号 姓名 各科考试成绩总分 平均分及每门课程的总分 平均分输入10\n");
printf("将学生信息写入文件 输入11：\n");
printf("从文件中读取学生信息输入12:\n");
scanf("%d",&m);
switch(m)
{
case 1:
SumforCorse(stu,n,sumcorse,avercorse);
break;
case 2:
SumforStudent(stu,n,sumstudent,averstudent);
break;
case 3:
DateScore(stu,n,Descending);
Printf(stu,n);
break;
case 4:
DateScore(stu,n,Ascending);
Printf(stu,n);
break;
case 5:
DateNum(stu,n);
Printf(stu,n);
break;
case 6:
DateName(stu,n);
Printf(stu,n);
break;
case 7:
{int j;
DateScore(stu,n,Descending);
printf("input the number you want to search:");
scanf("%ld",&x);
pos=LinSearch(stu,x,n);
if(pos!=-1)
printf("MT\t EN\t PH\t:\n");
for(j=0;j<3;j++)
{
printf("%d\t",stu[pos].score[j]);
}
printf("第%d名\n",pos+1);
break;
}
case 8:
{int j;
DateScore(stu,n,Descending);
printf("input the name you want to search:\n");
scanf("%s",name);
pos=LinSearchname(stu,name,n);
if(pos!=-1)
printf(&qu
ot;MT\t EN\t PH\t:\n");
for(j=0;j<3;j++)
{printf("%d\t",stu[pos].score[j]);}
}
printf("第%d名\n",pos+1);
break;

C语言 苏小红 第五版 十三章实验题答案

case 9:
RateScore(stu,n);
break;

case 10:
PrintfScoreNum(stu,n,sumcorse,avercorse);
break;
case 11:
WritetoFile(stu,n);
break;
case 12:
i= ReadfromFILE(stu);
Printf(stu,i);
break;

}
}
void InputScore(STUDENT stu[],int n)
{
int i,j,m=3;
for(i=0;i<n;i++)
{
printf("input the %d student ID name score(MT EN PH):",i+1);
scanf("%ld",&stu[i].studentID);
scanf("%s",stu[i].studentName);
for(j=0;j<m;j++)
{
scanf("%d",&stu[i].score[j]);
}
}
}
void SumforCorse(STUDENT stu[],int n,float sumcorse[],float avercorse[])
{
int i,j;
for(j=0;j<3;j++)
{
for(i=0;i<n;i++)
{
sumcorse[j]=sumcorse[j]+stu[i].score[j];
}
avercorse[j]=sumcorse[j]/n;
switch(j)
{
case 0:
printf("the MT totle MT:%f\n",sumcorse[j]);
printf("the MT aver MT:%f\n",avercorse[j]);
break;
case 1:
printf("the EN totle EN:%f\n",sumcorse[j]);
printf("the EN aver EN:%f\n",avercorse[j]);
break;
case 2:
printf("the PH totle PH:%f\n",sumcorse[j]);
printf("the PH aver PH:%f\n",avercorse[j]);
break;
}
}
}
void SumforStudent(STUDENT stu[],int n,float sumstudent[],float averstudent[])
{
int i,j;
for(i=0;i<n;i++)
{
for(j=0;j<3;j++)
{
sumstudent[i]=sumstudent[i]+stu[i].score[j];
}
averstudent[i]=sumstudent[i]/3;
printf("第%d个the totle score and average is %f %f\n ",i+1,sumstudent[i],averstudent[i]);

}
}
void DateScore(STUDENT stu[],int n,int (*compare)(int a,int b))
{int i,j,k,m,t,sumstudent[N];
char temp[MAX_LEN];
for(i=0;i<n;i++)
{
for(j=0;j<3;j++)
{
sumstudent[i]=sumstudent[i]+stu[i].score[j];
}
}
for(t=0;t<n-1;t++)
{
k=t;
for(m=t+1;m<n;m++)
{
if((*compare)(sumstudent[k],sumstudent[m]))
{
k=m;
}
if(k!=t)
{
Swapsum(&sumstudent[t],&sumstudent[k]);
Swapnum(&stu[t].studentID,&stu[k].studentID);
Swapscore(stu[t].score,stu[k].score);
strcpy(temp,stu[t].studentName);
strcpy(stu[t].studentName,stu[k].stud …… 此处隐藏：3802字，全部文档内容请下载后查看。喜欢就下载吧 ……