C语言成绩管理系统

最新问答

• winnietang1

  #include "stdio.h"
  struct stu{
  	int sid,score;
  	char g;
  };
  void scorein(struct stu *p,int n){
  	int i,t;
  	for(i=0;i		scanf("%d%d",&p[i].sid,&p[i].score);
  		p[i].g = (t=p[i].score)>89 && t<101 ? 'A' : t>79 && t<90 ? 'B' : t>69 && t<80 ? 'C' : t>59 && t<70 ? 'D' : 'E';
  	}
  }
  int sum(struct stu *p,int n){
  	int s=0;
  	while(n--)
  		s+=p++->score;
  	return s;
  }
  void dssort(struct stu *p,int n){
  	int i,j,k;
  	struct stu t;
  	printf("
  STUID	SCORE	CLASS
  =====================
  ");
  	for(i=0;i		for(k=i,j=k+1;j			if(p[k].score				k=j;
  		if(k!=i)
  			t=p[k],p[k]=p[i],p[i]=t;
  		printf("%d	%d	%c
  ",p[i].sid,p[i].score,p[i].g);
  	}
  }
  void idsort(struct stu *p,int n){
  	int i,j,k;
  	struct stu t;
  	printf("
  STUID	SCORE	CLASS
  =====================
  ");
  	for(i=0;i		for(k=i,j=k+1;j			if(p[k].sid>p[j].sid)
  				k=j;
  		if(k!=i)
  			t=p[k],p[k]=p[i],p[i]=t;
  		printf("%d	%d	%c
  ",p[i].sid,p[i].score,p[i].g);
  	}
  }
  void query(struct stu *p,int n){
  	int id;
  	printf("
  Please enter ID(int)...
  ");
  	scanf("%d",&id);
  	while(id-p->sid && n)
  		p++,n--;
  	if(n>=0){
  		printf("STUID	SCORE	CLASS
  =====================
  ");
  		printf("%d	%d	%c
  
  ",p->sid,p->score,p->g);
  	}
  	else
  		printf("No find!
  
  ");
  }
  void level(struct stu *p,int n){
  	int d[5],i;
  	char s[5][7]={"优秀","良好","中等","及格","不及格"};
  	printf("统计信息如下:
  ");
  	for(i=0;i<5;d[i++]=0);
  	for(i=0;ig-'A']++);
  	for(i=0;i<5;i++)
  		printf("%6s:	%d	%.2f%%
  ",s[i],d[i],d[i]/(n+0.0)*100);
  }
  void outinfo(struct stu *p,int n){
  	int i;
  	printf("
  STUID	SCORE
  =============
  ");
  	for(i=0;i		printf("%d	%d
  ",p[i].sid,p[i].score);
  }
  int main(int argc,char *argv[]){
  	int n,s;
  	struct stu a[30];
  	printf("Please enter n(int 0	if(scanf("%d",&n)!=1 || n<1 || n>30){
  		printf("Input error, exit...
  ");
  		return 0;
  	}
  	scorein(a,n);//输入
  	dssort(a,n);//分数降序
  	idsort(a,n);//学号升序
  	query(a,n);//查询
  	level(a,n);//等级和百分比
  	outinfo(a,n);//输出各位信息
  	printf("总分: %d",s=sum(a,n));
  	printf("   平均分:   %.2f
  ",s/(n+0.0));
  	return 0;
  }

  运行样例：
  

  浏览 447赞 53时间 2022-09-12