学生成绩管理系统v4.0

//成绩管理系统v1.0

// 能动1302 王清栋1306030217

#include

#include

#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: //计算每门课程的总分和平均分

Totalave (score,n,m);

printf("Please enter your choice:\n");

break;

case 3: //计算每个学生的总分和平均分

evestuTotalave (score,n,m,num);

break;

case 4: //按每个学生的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: //按每个学生的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: //成绩分析所占百分比

statistis (num,score,n,m);

printf("Please enter your choice:\n");

break;

case 9: //全部输出

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

{

printf("Input student's ID and score");

scanf("%ld",&num[i]);

for(j=0;j

scanf("%d",&score[i][j]);

}

}

void Totalave (int score[][M],int n,int m) //2.计算每门课程的总分和平均分

{

int i,j,sum[M];

double ave[M];

for(j=0;j

{

sum[j]=0;

for(i=0;i

{

sum[j]=sum[j]+score[i][j];

}

ave[j]=(double)sum[j]/n;

}

for(i=0;i

printf("科目%d的总分=%d,课程的平均分=%f\n",i+1,sum[i],ave[i]);

}

void evestuTotalave (int score[][M],int n,int m,long num[]) //3.计算每个学生的总分和平均分

{

int i,j,sum[N];

double ave[N];

for(i=0;i

{

sum[i]=0;

for(j=0;j

{

sum[i]=sum[i]+score[i][j];

}

ave[i]=(double)sum[i]/m;

}

for(i=0;i

printf("学号为%ld的总分=%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.按每个学生的总分由高到低排出名次表

{

int i,j,k,t,h,sum[N];

for(i=0;i

{

sum[i]=0;

for(j=0;j

{

sum[i]=sum[i]+score[i][j];

}

}

for(i=0;i

{

k=i;

for(j=i+1;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

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.按每个学生的总分由di到gao排出名次表

{

int i,j,k,t,h,sum[N];

for(i=0;i

{

sum[i]=0;

for(j=0;j

{

sum[i]=sum[i]+score[i][j];

}

}

for(i=0;i

{

k=i;

for(j=i+1;j

{

if (sum[j]

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

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

{

k=i;

for(j=i+1;j

{

if (num[j]

k=j;

}

if(i!=k)

{

h=num[k];

num[k]=num[i];

num[i]=h;

for(l=0;l

{

t[l]=score[k][l];

score[k][l]=score[i][l];

score[i][l]=t[l];

}

}

}

for(i=0;i

{

printf("ID:%10ld\n",num[i]);//以长整形打印用%ld

for(j=0;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

{

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

{

sum[i]=0;

for(j=0;j

{

sum[i]=sum[i]+score[i][j];

}

}

for(i=0;i

{

k=i;

for(j=i+1;j

{

if (num[j]

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

{

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

high=mid-1;

else

{

pos=mid;

find=1;

}

if(find==0)

printf("not find\n");

else

{

for(i=0;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

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

{

for(i=0;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("优秀人数%d,百分比:%f%%\n",a,A);

printf("良好人数%d,百分比:%f%%\n",b,B);

printf("中等人数%d,百分比:%f%%\n",c,C);

printf("及格人数%d,百分比:%f%%\n",d,D);

printf("不及格人数%d,百分比:%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

{

sum[i]=0;

for(j=0;j

{

sum[i]=sum[i]+score[i][j];

}

ave[i]=(double)sum[i]/m;

}

for(i=0;i

{

printf("ID:%10ld\n",num[i]);

for(j=0;j

{

printf("score:%d\n",score[i][j]);

}

printf("总分=%d\n平均分%f\n",sum[i],ave[i]);

}

}