Code C\C++: Ví dụ về màng cấu trúc - struct array


/* BAI TAP MANG CAU TRUC
  Viet cac ham thuc hien:
  1. Nhap vao thong tin cua n sinh vien (5<n<100), thong tin gom:
- Ho ten
- Tuoi
- Dia chi
- Lop
- Diem ky1 (he so 2)
- Diem ky2 (he so 3)
- Diem ky3 (he so 4)
- Diem ky4 (he so 5)
  2. Tinh diem Trung binh toan khoa hoc cho  n sinh vien vua nhap
  3. Tim va in ra sinh vien co diem TB lon nhat
  4. Dem so sinh vien co diem TB >=5.0
  5. Xet danh hieu cho sinh vien

*/
#include<conio.h> 
#include<stdio.h> 
#define MAX 100 
#define MIN 5 
// Dinh nghia 1 cau truc SV 
struct SV{  
char hoTen[30], diaChi[50],lop[5];  
int tuoi;  
float dk1,dk2,dk3,dk4,dtb;// dtb: diem trung binh 
}; 
// khai bao mang cau truc 
SV m[MAX];int n; // so sinh vien
//1. Ham nhap danh sach sinh vien 
void Nhap(){ // Nhap so sinh vien  
printf("\n + Nhap so sinh vien: ");

do{ printf("\n n= ");
scanf("%d",&n);
if (n<MIN||n>MAX)  
printf("\n => Moi ban nhap lai so sinh vien!");  
}while(n<MIN||n>MAX);

// Nhap danh sach sinh vien  
printf("\n + Nhap danh sach sinh vien:");  
for(int i=0;i<n;i++)  
{  
   printf("\n - Sinh vien %d",i+1);
  fflush(stdin);    
   printf("\n  Ho ten: "); 
   gets(m[i].hoTen);
fflush(stdin);  
printf("\n  Dia chi: "); 
gets(m[i].diaChi);
fflush(stdin);
printf("\n  Lop: ");
gets(m[i].lop); 
printf("\n  Tuoi: ");
scanf("%d",&m[i].tuoi); 
printf("\n  Diem hoc ky 1: ");
scanf("%f",&m[i].dk1); 
printf("\n  Diem hoc ky 2: ") 
scanf("%f",&m[i].dk2); 
printf("\n  Diem hoc ky 3: ");
scanf("%f",&m[i].dk3); 
printf("\n  Diem hoc ky 4: ");
scanf("%f",&m[i].dk4);
} 
}

//2. Tinh diem trung binh  
void TinhDiem(){ // tinh diem  
for(int i=0;i<n;i++)
m[i].dtb=(m[i].dk1*2+m[i].dk2*3+m[i].dk3*4+m[i].dk4*5)/14;  
// In diem
printf(" + In diem trung binh cua sinh vien: ");
for (i=0;i<n;i++)  
printf("\n - Sinh vien %s co diem TB: %f",m[i].hoTen,m[i].dtb);}

//3. Tim va in ra nhung sinh vien co diem lon nhat
void TimSV_DiemMax(){ // tim diem trung binh lon nhat  
float max=m[0].dtb;  
for(int i=1;i<n;i++)
if (m[i].dtb>max) max=m[i].dtb;

// In ra ho ten cua nhung sinh vien co diem trung binh lon nhat

printf("\n + Nhung sinh vien co diem trung binh cao nhat (%f):",max);
for (i=0;i<n;i++)
 if (m[i].dtb==max)
   printf("\n - %s",m[i].hoTen);
}

//4. Dem so sinh vien co diem >=5

inDemSV(){ 
int dem=0;  
for(int i=0;i<n;i++)  
  if (m[i].dtb>=5) dem++; 
  return dem;
}

//5. Xet danh hieu sinh vien

void XetDanhHieu(){ 
printf("\n + Xet danh hieu:"); 
for(int i=0;i<n;i++) 
{ 
float d=m[i].dtb; 
printf("\n Sinh vien %s dat danh hieu: ",m[i].hoTen); 
if (d.dtb<3.5) printf("Kem"); 
else if (d<5) printf("Yeu");
else if (d<7) printf("TB");  
else if(d<8) printf("Kha");
else printf("Gioi"); }}

// ham chinh

int main()
{
Nhap();
TinhDiem();
TimSV_DiemMax(); 
printf("\n + So sinh vien co diem trung binh >=5 la: %d",DemSV()) 
XetDanhHieu();
 getch(); 
return 0; 
}

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