新版学生成绩标准管理系统.doc

//成绩管理系统v1.0
// 能动1302 王清栋
#include <stdio.h>
#include <stdlib.h>
#define N 30
#define M 6
void Input (long num[],int score[][M],int n,int m);
void Totalave (int score[][M],int n,int m);
void evestuTotalave (int score[][M],int n,int m,long num[]);
void Scoredes (long num[],int score[][M],int n,int m);
void Scoreas (long num[],int score[][M],int n,int m);
void Numas (long num[],int score[][M],int n,int m);
void Search (long num[],int score[][M],int n,int x,int m);
void statistis (long num[],int score[][M],int n,int m);
void List (long num[],int score[][M],int n,int m);
int main()
{
int n,score[N][M],c,x,m;
long num[N];
printf("输入学生人数");
scanf("%d",&n);
printf("输入考试科目");
scanf("%d",&m);
printf("1.Input record\n");
printf("2.Caculate totel and average score of every course\n");
printf("3.Caculate totel and average score of every student\n");
printf("4.Sort in descending order by total score of every student\n");
printf("5.Sort in ascending order by total score of every student\n");
printf("6.Sort in ascending order by number\n");
printf("7.Search by number\n");
printf("8.Statistic analysis for every course\n");
printf("9.List record\n");
printf("0.Exit\n");
printf("Please enter your choice:\n");
printf("\n");
for(;;)
{
scanf("%d",&c);
switch(c)
{
case 1： //录入学生学号和各科成绩
Input (num,score,n,m);
printf("Please enter your choice:\n");
break;
case 2： //计算每门课程总分和平均分
Totalave (score,n,m);
printf("Please enter your choice:\n");
break;
case 3： //计算每个学生总分和平均分
evestuTotalave (score,n,m,num);
break;
case 4： //按每个学生总分由高到低排出名次表
Scoredes (num,score,n,m);
printf("Please enter your choice:\n");
break;
case 5： //按每个学生总分由低到高排出名次表
Scoreas (num,score,n,m);
printf("Please enter your choice:\n");
break;
case 6： //按学号由小到大排出名次表
Numas (num,score,n,m);
printf("Please enter your choice:\n");
break;
case 7： //按学号查询学生排名及其各科成绩
printf("请输入查找学号\n");
scanf("%d",&x);
Search (num,score,n,x,m);
printf("Please enter your choice:\n");
break;
case 8： //成绩分析 所占比例
statistis (num,score,n,m);
printf("Please enter your choice:\n");
break;
case 9： //所有输出
List (num,score,n,m);
Totalave (score,n,m);
printf("Please enter your choice:\n");
break;
case 0:
exit(0);
}
}
return 0;
}
void Input (long num[],int score[][M],int n,int m) //1
{
int i,j;
for(i=0;i<n;i++)
{
printf("Input student's ID and score");
scanf("%ld",&num[i]);
for(j=0;j<m;j++)
scanf("%d",&score[i][j]);
}
}
void Totalave (int score[][M],int n,int m) //2.计算每门课程总分和平均分
{
int i,j,sum[M];
double ave[M];
for(j=0;j<m;j++)
{
sum[j]=0;
for(i=0;i<n;i++)
{
sum[j]=sum[j]+score[i][j];
}
ave[j]=(double)sum[j]/n;
}
for(i=0;i<m;i++)
printf("科目%d总分=%d,课程平均分=%f\n",i+1,sum[i],ave[i]);
}
void evestuTotalave (int score[][M],int n,int m,long num[]) //3.计算每个学生总分和平均分
{
int i,j,sum[N];
double ave[N];
for(i=0;i<n;i++)
{
sum[i]=0;
for(j=0;j<m;j++)
{
sum[i]=sum[i]+score[i][j];
}
ave[i]=(double)sum[i]/m;
}
for(i=0;i<n;i++)
printf("学号为%ld总分=%d,其平均分=%f\n",num[i],sum[i],ave[i]);
}
void Scoredes (long num[],int score[][M],int n,int m) //4.按每个学生总分由高到低排出名次表
{
int i,j,k,t,h,sum[N];
for(i=0;i<n;i++)
{
sum[i]=0;
for(j=0;j<m;j++)
{
sum[i]=sum[i]+score[i][j];
}
}
for(i=0;i<n;i++)
{
k=i;
for(j=i+1;j<n;j++)
{
if (sum[j]>sum[k])
k=j;
}
if(i!=k)
{
t=sum[k],h=num[k];
sum[k]=sum[i],num[k]=num[i];
sum[i]=t,num[i]=h;
}
}
for(i=0;i<n;i++)
printf("ID:%10ld,score:%d\n",num[i],sum[i]);//以长整形打印用%ld
}
void Scoreas (long num[],int score[][M],int n,int m) //5.按每个学生总分由di到gao排出名次表
{
int i,j,k,t,h,sum[N];
for(i=0;i<n;i++)
{
sum[i]=0;
for(j=0;j<m;j++)
{
sum[i]=sum[i]+score[i][j];
}
}
for(i=0;i<n;i++)
{
k=i;
for(j=i+1;j<n;j++)
{
if (sum[j]<sum[k])
k=j;
}
if(i!=k)
{
t=sum[k],h=num[k];
sum[k]=sum[i],num[k]=num[i];
sum[i]=t,num[i]=h;
}
}
for(i=0;i<n;i++)
printf("ID:%10ld,score:%d\n",num[i],sum[i]);//以长整形打印用%ld
}
void Numas (long num[],int score[][M],int n,int m) //6.按学号由小到大排出名次表
{
int i,j,k,t[M],h,l;
for(i=0;i<n;i++)
{
k=i;
for(j=i+1;j<n;j++)
{
if (num[j]<num[k])
k=j;
}
if(i!=k)
{
h=num[k];
num[k]=num[i];
num[i]=h;
for(l=0;l<m;l++)
{
t[l]=score[k][l];
score[k][l]=score[i][l];
score[i][l]=t[l];
}
}
}
for(i=0;i<n;i++)
{
printf("ID:%10ld\n",num[i]);//以长整形打印用%ld
for(j=0;j<m;j++)
printf("project %d score:%d\n",j+1,score[i][j]);
}
}
void Search (long num[],int score[][M],int n,int x,int m) //7.按学号查询学生排名及其各科成绩
{
int high=n-1,low=0,mid,c=1,pos,o,find=0,i,j,k,t[M],h,sum[N],l;
for(i=0;i<n;i++)
{
sum[i]=0;
for(j=0;j<m;j++)
{
sum[i]=sum[i]+score[i][j];
}
}
for(i=0;i<n;i++)
{
k=i;
for(j=i+1;j<n;j++)
{
if (num[j]<num[k])
k=j;
}
if(i!=k)
{
h=num[k],o=sum[k];
num[k]=num[i],sum[k]=sum[i];
num[i]=h,sum[i]=o;
for(l=0;l<m;l++)
{
t[l]=score[k][l];
score[k][l]=score[i][l];
score[i][l]=t[l];
}
}
}
while(find==0&&low<=high)
{
mid=(high+low)/2;
if(x>num[mid])
low=mid+1;
else if(x<num[mid])
high=mid-1;
else
{
pos=mid;
find=1;
}
}
if(find==0)
printf("not find\n");
else
{
for(i=0;i<n;i++)
{
if(sum[i]>sum[pos])
c++;
}
printf("ID:%10ld\n",num[pos]);//以长整形打印用%ld
for(j=0;j<m;j++)
printf("project %d score:%d\n",j+1,score[pos][j]);
printf("all score：%d,order:%d\n",sum[pos],c);

}
}
void statistis (long num[],int score[][M],int n,int m) //8.
{
int a=0,b=0,c=0,d=0,e=0,i,j;
double A,B,C,D,E;
for(j=0;j<m;j++)
{
for(i=0;i<n;i++)
{
if(score[i][j]>=90)
a++;
else if(score[i][j]>=80)
b++;
else if(score[i][j]>=70)
c++;
else if(score[i][j]>=60)
d++;
else
e++;
}
A=(double)a/n*100;
B=(double)b/n*100;
C=(double)c/n*100;
D=(double)d/n*100;
E=(double)e/n*100;
printf("project %d\n",j+1);
printf("先进人数%d,比例:%f%%\n",a,A);
printf("良好人数%d,比例:%f%%\n",b,B);
printf("中档人数%d,比例:%f%%\n",c,C);
printf("及格人数%d,比例:%f%%\n",d,D);
printf("不及格人数%d,比例:%f%%\n",e,E);
}
}
void List (long num[],int score[][M],int n,int m)
{
int i,j,sum[N];
double ave[N];
for(i=0;i<n;i++)
{
sum[i]=0;
for(j=0;j<m;j++)
{
sum[i]=sum[i]+score[i][j];
}
ave[i]=(double)sum[i]/m;
}
for(i=0;i<n;i++)
{
printf("ID:%10ld\n",num[i]);
for(j=0;j<m;j++)
{
printf("score:%d\n",score[i][j]);
}
printf("总分=%d\n平均分%f\n",sum[i],ave[i]);
}
}