Bài Tập - Tệp dữ liệu docx

TỆP Bài 1:

#include<conio.h>

#include<stdio.h>

#include<string.h>

void nhapmt(float pa[][100],int n,int m,char x)

{

int i,j;float tg;

for(i=1;i<=n;i++)

for(j=1;j<=m;j++)

{ printf("\n %c[%d,%d] = ",x,i,j);

scanf("%f",&tg);pa[i][j]=tg;

} }

void inmt(float pa[][100],int n,int m,char x)

{

FILE *f;char s[]="CONG_MT.C";

int i,j;

if ((x=='a')||(x=='A')) f=fopen(s,"w");

else f=fopen(s,"a");

fprintf(f,"ma tran %c : \n",x);

for(i=1;i<=n;i++)

{ for(j=1;j<=m;j++) fprintf(f,"%6.1f",pa[i][j]);

fprintf(f,"\n");

} fclose(f);

}

void main()

{

float a[100][100],b[100][100],c[100][100],tg;int n,m,i,j,k;

printf("\n nhap n,m : ");scanf("%d%d",&n,&m);

nhapmt(a,n,m,'a');

nhapmt(b,n,m,'b');

for(i=1;i<=n;i++)

for(j=1;j<=m;j++)

{ c[i][j]=a[i][j]+b[i][j];

} inmt(a,n,m,'a');

inmt(b,n,m,'b');

inmt(c,n,m,'c');

getch();

}

Bài 2 :

#include<stdio.h>

#include<conio.h>

char sa[50],sb[50],sc[]="Ma tran C : ";

void nhapmt(float pa[][100],float pb[][100],int *n,int *p,int *m)

{

int i,j;float tg;

FILE *f;

f=fopen("TICH_MT.C","r");

fscanf(f,"%d%d%d",n,p,m);

fgets(sa,50,f);fgets(sa,50,f);

for(i=1;i<=*n;i++)

for(j=1;j<=*p;j++)

{

fscanf(f,"%f",&tg);pa[i][j]=tg;

}

fgets(sb,50,f);fgets(sb,50,f);

for(i=1;i<=*p;i++)

for(j=1;j<=*m;j++)

{

fscanf(f,"%f",&tg);pb[i][j]=tg;

}

fclose(f);

}

void inmt(float pa[][100],int n,int m)

{

FILE *f;char s[]="TICH_MT.C";

int i,j;

f=fopen(s,"a");

fprintf(f,"ma tran C : \n");

for(i=1;i<=n;i++)

{ for(j=1;j<=m;j++) fprintf(f,"%6.1f",pa[i][j]);

fprintf(f,"\n");

} fclose(f);

}

void main()

{

float a[100][100],b[100][100],c[100][100],tg;int n,m,p,i,j,k;

nhapmt(a,b,&n,&p,&m);

for(i=1;i<=n;i++)

for(j=1;j<=m;j++)

{ c[i][j]=0;

c[i][j]+=a[i][k]*b[k][j];

} inmt(c,n,m);

getch();

}

Bài 3 :

#include<stdio.h>

#include<conio.h>

#include<string.h>

char s[]="SO_LIEU.C";

typedef struct slbh

{

int dg;int sl;char ten[30];long int tien;

};

long int tt=0;

int n;

struct slbh a[50],swap;

void nhapdl()

{

int i;FILE *f;

clrscr();

printf("\n nhap vao so hang n = ");scanf("%d",&n);

f=fopen(s,"wb");

for(i=0;i<=n-1;i++)

{

printf("\n nhap mat hang thu %d : ",i+1);

printf("\n Ten hang : ");fflush(stdin);gets(a[i].ten);

printf(" Don gia : ");scanf("%d",&a[i].dg);

printf(" So luong : ");scanf("%d",&a[i].sl);

a[i].tien=(long int)(a[i].dg)*(long int)(a[i].sl);

tt+=a[i].tien;

}

fwrite(a,sizeof(slbh),n,f);

fclose(f);

printf("\n\t Nhap xong Press any key ");getch();

}

void indl()

{

int i;FILE *f;slbh b[50];

char *g[]={"STT","tenhang","Don gia","So luong","Thanh tien"};

clrscr();

f=fopen(s,"rb");

printf("\n\t\t\t SO LIEU BAN HANG");

printf("\n %3s %30s %10s %10s %10s \n",g[0],g[1],g[2],g[3],g[4]);

for(i=0;i<n;i++)

{

fread(b,sizeof(slbh),n,f);

printf("%3d %30s %10d %10d %10ld \n",i+1,b[i].ten,b[i].dg,b[i].sl,b[i].tien); }

printf("\n\t\t\t\t\t Tong tien : %ld",tt);

fclose(f);

printf("\n\t press any key ");

getch();

}

void main()

{

int k;

clrscr();

nhapdl();

indl();

}

Bài 4 :

#include<stdio.h>

#include<conio.h>

#include<string.h>

#include<alloc.h>

struct dssv

{

char ho_ten[30];int tuoi;float dtb;

}a[50] ;

int n;

long size = sizeof(dssv);

char ss[]="DANHSACH.C";

void nhap()

{

dssv x;int i=-1;FILE *f;float dtb1;

f=fopen(ss,"ab");

do

{

i++;

printf("\n Bo sung sinh vien : ");

printf("\n Ho ten : ");fflush(stdin);gets(x.ho_ten);

printf(" Tuoi : ");scanf("%d",&x.tuoi);

printf(" Diem trungbinh : ");scanf("%f",&x.dtb);

printf("\n Bam ESC de dung nhap ");

fwrite(&x,size,1,f);a[i]=x;

}

while (getch()!=27);

n=i+1;

fclose(f);

}

void in()

{

FILE *f;int i=0;dssv x;

char *s[]={"STT","HO TEN","TUOI","DIEM TB"};

f=fopen(ss,"rb");

if (f==NULL) {printf("\n khong co tep ");getch();}

else

{

printf("\n\t\t\t DANH SACH SINH VIEN ");

printf("\n%4s%30s%10s%10s",s[0],s[1],s[2],s[3]);

while (fread(&x,size,1,f)>0)

{

i++;

printf("\n%4d%30s%10d%10.1f",i+1,x.ho_ten,x.tuoi,x.dtb);

}

}

fclose(f);

getch();

}

void sua()

{

dssv x;FILE *f;char ten[30];int i=0;

printf("\n Nhap ten sinh vien muon sua diem : ");

gets(ten);

for(i=0;i<n;i++)

if (strcmpi(a[i].ho_ten,ten)==0) break;

if (strcmpi(a[i].ho_ten,ten)!=0)

printf("\n khong tim thay sinh vien %s ",ten);

else

{

printf("\n Sua tuoi : ");scanf("%d",&a[i].tuoi);

printf("\n sua diem tb : ");scanf("%f",&a[i].dtb);

f=fopen(ss,"wb");

fwrite(a,sizeof(dssv),n,f);

fclose(f);

printf("\n Da sua xong ");getch();

}

}

void main()

{

int k;

remove("DANHSACH.C");

do

{

clrscr();

printf("\n 1 Bo sung.");

printf("\n 2 Sua.");

printf("\n 3 In.");

printf("\n 4 Exit.");

printf("\n Moi chon cac chuc nang (^-^)");

scanf("%d%*c",&k);

if (k==1) nhap();

if (k==2) sua();

if (k==3) in();

if (k>4) {printf("\n Nhap sai chuc nang.Press any key ^^!");getch();}

}

while (k!=4);

}

To be continue…bài tập về màn hình và đồ hoạ