C语言实现简易学生成绩管理系统
#include
#include
#include
//宏定义最大学生人数
#define stu_max 30
/*进行函数的全局声明*/
//获取学生人数
int stu_num();
//显示菜单获取用户输入
char menu_tips();
//获取学生学号，及本门考试成绩
void stu_information(long num[],float score[],int n);
//计算输出课程的总分和平均分
void sum_aver(float score[],int n);
//模块功能：交换两个长整型数据
void exchange_long(long *a,long *b);
//模块功能：交换两个浮点型数据
void exchange_float(float *a,float *b);
//按成绩由高到低输出名次表
void output_score(long num[],float score[],int n);
//按学号从小到大排出成绩表
void output_num(long num[],float score[],int n);
//查询输出学生信息及考试成绩：
void query(long num[],float score[],int n);
//分数划界处理并输出
void score_pro(float score[],int n);
//直接输出对应列表
void output(long num[],float score[],int n);
//暂停清屏
void clean();
int main()
{
int n,i;
long num[stu_max];
float score[stu_max];
n=stu_num();
while(1)
{
i=menu_tips();
switch(i)
{
case '1':printf("1"),stu_information(num,score,n),system("cls");break;
case '2':printf("2"),sum_aver(score,n),clean();break;
case '3':printf("3"),output_score(num,score,n),clean();break;
case '4':printf("4"),output_num(num,score,n),clean();break;
case '5':printf("5"),query(num,score,n),clean();break;
case '6':printf("6"),score_pro(score,n),clean();break;
case '7':printf("7"),output(num,score,n),clean();break;
case '0':printf("0"),exit(0);break;
default:printf("Input error!
"),clean();
}
}
}
/*以下为函数功能模块*/
//获取学生人数
int stu_num()
{
int n;
printf("Input student number(n<30):
");
scanf("%d",&n);
system("cls");
return n;
}
//显示菜单获取用户输入
char menu_tips()
{
printf(" -----------------------------------------------------------
");
printf("| Management for Students' scores |
");
printf(" -----------------------------------------------------------
");
printf("| 1.Input record |
");
printf("| 2.Calculate total and average score of course |
");
printf("| 3.Sort in descending order by score |
");
printf("| 4.Sort in ascending order by numbe |
");
printf("| 5.Search by number |
");
printf("| 6.Statistic analysis |
");
printf("| 7.List record |
");
printf("| 0.Exit |
");
printf(" -----------------------------------------------------------
");
printf("
Please Input your choice:
");
char i;
i=getch();
return i;
}
//获取学生学号，及本门考试成绩
void stu_information(long num[],float score[],int n)
{
int i;
printf("
Input student's ID and score:
");
for(i=0;i scanf("%ld%f",&num[i],&score[i]); } //计算输出课程的总分和平均分 void sum_aver(float score[],int n) { int i; float sum,aver; for(i=0,sum=0;i sum+=score[i]; aver=sum/n; printf(" sum=%.0f,aver=%.2f ",sum,aver); } //模块功能：交换两个长整型数据 void exchange_long(long *a,long *b) { long t; t=*a; *a=*b; *b=t; } //模块功能：交换两个浮点型数据 void exchange_float(float *a,float *b) { float t; t=*a; *a=*b; *b=t; } //按成绩由高到低输出名次表 void output_score(long num[],float score[],int n) { int i,j; for(j=n-1;j>0;j--) { for(i=0;i if(score[i] { exchange_float(&score[i],&score[i+1]); exchange_long(&num[i],&num[i+1]); } } printf(" Sort in descending order by score:"); output(num,score,n); } //按学号从小到大排出成绩表 void output_num(long num[],float score[],int n) { int i,j; for(j=n-1;j>0;j--) { for(i=0;i if(num[i]>num[i+1]) { exchange_float(&score[i],&score[i+1]); exchange_long(&num[i],&num[i+1]); } } output(num,score,n); } //查询输出学生信息及考试成绩： void query(long num[],float score[],int n) { printf(" Enter the ID to query: "); long temp; scanf("%ld",&temp); int i; for(i=0;i { if(num[i]==temp) { printf("%ld %.0f ",num[i],score[i]); return; } } printf(" Not found! "); } //分数划界处理并输出 void score_pro(float score[],int n) { int t[6]={0,0,0,0,0,0}; /*前五个分别对应优秀、良好、中等、及格、不及格五个类别 第六位存储100分的人数*/ int i,m; for(i=0;i { if(score[i]>=90&&score[i]<100) t[0]++; if(score[i]>=80&&score[i]<=89) t[1]++; if(score[i]>=70&&score[i]<=79) t[2]++; if(score[i]>=60&&score[i]<=69) t[3]++; if(score[i]>=0 &&score[i]<=59) t[4]++; if(score[i]==100) t[5]++; } //遍历t数组，输出对应的数据 for(i=0,m=9;i<6;i++) { if(i==4) printf("<60 %d %.2f%% ",t[4],(float)t[4]/n*100); if(i==5) printf("%d %d %.2f%% ",100,t[5],(float)t[5]/n*100); if(i!=4&&i!=5) { if(i==0) printf(" "); printf("%d-%d %d %.2f%% ",m*10,m*10+9,t[i],(float)t[i]/n*100); m--; } } } //直接输出对应列表 void output(long num[],float score[],int n) { int i; for(i=0;i { if(i==0) printf(" "); printf("%ld %.0f ",num[i],score[i]); } } //暂停清屏 void clean() { system("pause"); system("cls"); }