Bài tập C cơ bản pptx

Dấu sao tam giác vuông#include"stdio.h" #include"conio.h" #include"math.h" void main { clrscr; int n,i,j,k; printf "\nBan hay nhap so nguyen duong n sao cho 0.

Trang 1

Dấu sao tam giác vuông

#include"stdio.h"

#include"conio.h"

#include"math.h"

void main()

{

clrscr();

int n,i,j,k;

printf ("\nBan hay nhap so nguyen duong n

sao cho 0<n<25");

printf ("\nn=");scanf ("%d",&n);

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

{

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

printf ("*");

printf ("\n");

}

getch();

}

đọc số bằng chữ

#include"conio.h"

#include"stdio.h"

#include"math.h"

void main()

{

clrscr();

int a,b,c,n,k;

k=0;

do

{

printf ("\nBan hay nhap so n sao cho

0<n<1000");

if (n<1000) k=1;

if (k==0) printf ("\nBan hay nhap lai n");

}

while (k==0);

a=n%10;

n=n/10;

b=n%10;

n=n/10;

c=n%10;

printf ("\nSo ban vua nhap vao la: ");

switch(c)

{

case 0:printf (" ");break;

case 1:printf ("mot ");break;

case 2:printf ("hai ");break;

case 3:printf ("ba "); break;

case 4:printf ("bon ");break;

case 5:printf ("nam ");break;

case 6:printf ("sau ");break;

case 7:printf ("bay ");break;

case 8:printf ("tam ");break;

case 9:printf ("chin ");break;

default:break;

}

if (c!=0) printf ("tram ");

if ((c!=0)&&(b==0)) printf ("linh ");

if (b!=0) { switch(b) {

case 1:printf ("muoi ");break;

default:break;

} }

if (b>1) printf ("muoi ");

else printf (" ");

switch(a) {

case 0:printf (" ");break;

} getch();

}

ucln,bcnn

#include"conio.h"

#include"stdio.h"

#include"math.h"

void main() {

clrscr();

int a,b,c,i,USCLN,BSCNN;

printf ("\nBan hay nhap 2 so nguyen duong a

va b");

printf ("\na=");scanf ("%d",&a);

printf ("\nb=");scanf ("%d",&b);

for (i=1;i<=a;i++) {

Trang 2

if ((a%i==0)&&(b%i==0)) USCLN=i;

}

printf ("\nUoc so chung lon nhat la

%d",USCLN);

BSCNN=(a*b)/USCLN;

printf ("\nBoi so chung nho nhat la

%d",BSCNN);

getch();

}

sao hình tam giác

#include"stdio.h"

#include"conio.h"

#include"math.h"

void main()

{

clrscr();

int n,i,j,k;

sao cho 0<n<25");

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

{

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

printf (" ");

for (j=1;j<=2*i-1;j++)

printf ("*");

printf ("\n");

}

getch();

}

dấu sao tam giác vuông_bài 8

#include"stdio.h"

#include"conio.h"

#include"math.h"

void main()

{

clrscr();

int n,i,j,k;

sao cho 0<n<25");

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

{

printf (" ");

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

printf ("*");

printf ("\n");

} getch();

}

in ra chữ số lẻ

#include"stdio.h"

#include"conio.h"

#include"math.h"

void main() {

clrscr();

int m,n,d,t;

printf ("\nBan hay nhap vao so nguyen duong n");

m=n;

t=0;

while (m!=0) {

d=m%10;

m=m/10;

if (d%2==1) {

printf ("\nCac chu so le cua %d la %d ",n,d); t=1;

} }

if (t==0) printf ("\n%d khong co chu so le nao",n);

getch();

}

viết 00 đến 99

#include"conio.h"

#include"stdio.h"

#include"math.h"

void main() {

clrscr();

int i,j;

for (i=0;i<=9;i++) {

for (j=0;j<=9;j++) printf ("%7d",i*10+j);

printf ("\n");

} getch();

}

nhập số nguyên dương không quá 4 số

#include"stdio.h"

#include"conio.h"

Trang 3

void main()/*Luu y n la kieu nguyen nen khi

nhap n khong qua 32767*/

{

clrscr();

int k,n,m,d,t;

k=0;

t=0;

do

{

printf ("\nBan hay nhap n la so co khong qua 4

chu so");

if (n<10000) k=1;

if (k==0) printf ("\nBan hay nhap lai n");

}

while (k==0);

m=n;

while (d!=0)

{

d=m%10;

m=m/10;

t=t+d;

}

printf ("\nTong cac chu so cua %d la %d",n,t);

getch();

}

in ra tam giác số

#include"stdio.h"

#include"conio.h"

#include"math.h"

void main()

{

clrscr();

int n,i,j,k;

sao cho 0<n<25");

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

{

printf (" ");

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

printf ("%d",j);

for (j=1;j<=i-1;j++) printf ("%d",i-j);

printf ("\n");

}

getch();

}

các số xuất hiện hơn 1 lần 1 dãy

#include"conio.h"

#include"stdio.h"

#include"math.h"

void main() {

clrscr();

int a[50],n,i,j,tg,k;

printf ("\nBan hay nhap n");

printf ("\nNhap cac phan tu trong day:"); for (i=1;i<=n;i++)

{ printf ("\nPhan tu thu %d la ",i);scanf ("%d",&a[i]);

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

if (a[i]>a[j]) {

tg=a[i];

a[i]=a[j];

a[j]=tg;

} k=0;

printf ("\nCac so xuat hien nhieu hon 1 lan trong day la: ");

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

if (a[i]==a[i+1]) {

printf ("%d ",a[i]);

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

if (a[i]!=a[j]) {

i=j-1;

break;

} } getch();

}

diện tích tam giác

#include"math.h"

#include"conio.h"

#include"stdio.h"

void main() /*Tinh dien tich tam giac*/

{ clrscr();

float a,b,c,p,dientich;

printf ("Ban hay nhap chieu dai 3 canh cua tam giac a,b,c");

printf ("\na=");scanf ("%f",&a);

printf ("\nb=");scanf ("%f",&b);

printf ("\nc=");scanf ("%f",&c);

Trang 4

if ((a+b>c)&&(b+c>a)&&(c+a>b))

{

p=(a+b+c)/2;

dientich=sqrt(p*(p-a)*(p-b)*(p-c));

printf ("\nDien tich tam giac la %f",dientich);

}

else printf ("\na,b,c khong phai 3 canh cua 1

tam giac");

getch();

}

pt bậc 2

#include"math.h"

#include"conio.h"

#include"stdio.h"

void main() /*Giai phuong trinh bac 2*/

{

clrscr();

float a,b,c,denta;

printf ("Ban hay nhap 3 so a,b,c");

denta=b*b-4*a*c;

if (denta<0) printf ("\nPhuong trinh vo

nghiem");

else if (denta==0) printf ("\nPhuong trinh co

nghiem kep x1=x2=%f",-b/2*a);

else printf ("\nPhuong trinh co 2 nghiem \

nx1=%f

\nx2=%f",(-b-sqrt(denta))/2*a,(-b+sqrt(denta))/2*a);

getch();

}

pt bậc 4

#include"stdio.h"

#include"math.h"

#include"conio.h"

void main() /*Giai phuong trinh bac 4*/

{

clrscr();

float a,b,c,denta;

printf ("\nBan hay nhap 3 so a,b,c");

denta=b*b-4*a*c;

if (denta<0) printf ("\nPhuong trinh vo

nghiem");

else if (denta==0) printf ("\nPhuong trinh co 2 nghiem \nx1=%f \nx2=%f",(-sqrt(-b/2*a)), (sqrt(-b/2*a)));

else printf ("\nPhuong trinh co 4 nghiem phan biet \nx1=%f \nx2=%f \nx3=%f \nx4=

%f",(-sqrt((-b+sqrt(denta))/2*a)),(sqrt((-b+sqrt(denta))/2*a)),(-sqrt((-b-sqrt(denta))/ 2*a)),(sqrt((-b-sqrt(denta))/2*a)));

getch();

}

tìm số lớn nhất trong 3 số

#include"math.h"

#include"conio.h"

#include"stdio.h"

void main() /*Tim so lon nhat trong 3 so*/ {

clrscr();

float a,b,c,max;

printf ("Ban hay nhap 3 so a,b,c");

if (a>b) max=a;

else max=b;

if (max<c) max=c;

printf ("\nSo lon nhat trong 3 so la %f",max); getch();

}

bảng cửu chương

#include"conio.h"

#include"stdio.h"

#include"math.h"

void main() {

clrscr();

int i,j;

for (i=1;i<=10;i++) {

for (j=1;j<=10;j++) printf ("%7d",i*j);

printf ("\n");

} getch();

}

F=x/1!+x2/2!+…+xn/n!

#include"stdio.h"

#include"conio.h"

#include"math.h"

Trang 5

void main()

{

clrscr();

float x,f;

int n,sh,a,i;

printf ("Ban hay nhap n va x");

printf ("\nx=");scanf ("%f",&x);

sh=1;

f=0;

a=1;

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

{

sh=sh*x;

a=a*i;

f=f+(float)(sh)/a;

}

printf ("\nGia tri cua bieu thuc la f=%f",f);

getch();

}

mức tăng dân số hàng năm

#include"conio.h"

#include"stdio.h"

#include"math.h"

void main()

{

clrscr();

int x,z,t;

float y;

printf ("\nBan hay nhap x,y,z");

printf ("\nDan so the gioi hien tai la ");scanf

("%d",&x);

printf ("\nMuc tang dan so hang nam la

");scanf ("%f",&y);

printf ("\nDan so the gioi trong tuong lai

");scanf ("%d",&z);

t=0;

while (x<z)

{

x=x+x*(float)(y)/100;

t++;

}

printf ("\nSo nam de dan so vuot qua %d

nguoi la %d ",z,t);

getch();

}

in ra n ở dạng nhị phân

#include"stdio.h"

#include"conio.h"

#include"math.h"

void main()

{ clrscr();

int m,n,d,t,k;

printf ("\nBan hay nhap vao so nguyen duong n");

m=n;

t=0;

k=0;

while (m!=0) {

d=m%2;

m=m/2;

t=t+d*pow(10,k);

k++;

} printf ("\nDang nhi phan cua %d la %d",n,t); getch();

}

in ra n ở hệ đếm cơ số 16

#include"stdio.h"

#include"conio.h"

#include"math.h"

void main() {

clrscr();

int a[50],d,m,n,i,j;

printf ("Ban hay nhap n");

m=n;

i=0;

while (m!=0) {

d=m%16;

m=m/16;

i=i+1;

a[i]=d;

} printf ("\n%d bieu dien duoi dang co so 16 la:",n);

for (j=i;j>=1;j ) switch (a[j]) {

case 10:printf ("A");break;

case 11:printf ("B");break;

case 12:printf ("C");break;

case 13:printf ("D");break;

case 14:printf ("E");break;

case 15:printf ("F");break;

default:printf ("%d",a[j]);

} getch();

}

Trang 6

in ra màn hình những số nguyên tố < n

#include"conio.h"

#include"math.h"

#include"stdio.h"

void main()

{

clrscr();

int n,i,j,kt;

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

{

kt=1;

for (j=2;j<=i-1;j++)

if (i%j==0)

{

kt=0;

break;

}

if (kt==1) printf ("\nSo nguyen to nho hon n la

%d",i);

}

getch();

}

in ra những số hoàn hảo < n

#include"conio.h"

#include"math.h"

#include"stdio.h"

void main()

{

clrscr();

int n,i,j,t;

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

{

t=0;

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

if (i%j==0) t=t+j;

if (t/i==2) printf ("\nSo hoan hao nho hon n la

%d",i);

}

getch();

}

in ra màn hình giá trị biểu thức f(x,y)

#include"conio.h"

#include"math.h"

#include"stdio.h"

void main() {

clrscr();

float x,y,f;

printf ("\nBan hay nhap x,y");

printf ("\ny=");scanf ("%f",&y);

if (x<y) f=2*x-y*y+2;

if (x==y) f=exp(x*y-y)+sin(x-3*y);

if (x>y) f=log(x*x*x-2*x*y) +sqrt(x*x+2*y*y);

printf ("\nGia tri bieu thuc la %f",f);

getch();

}

S=1 + 2 k k +….+3 k

#include"conio.h"

#include"stdio.h"

#include"math.h"

void main() {

clrscr();

int n,k,i,s;

printf ("\nBan hay nhap 2 so n va k");

printf ("\nk=");scanf ("%d",&k);

s=0;

for (i=1;i<=n;i++) s=s+pow(i,k);

printf ("\nGia tri cua tong voi n=%d va x=%d

la %d",n,k,s);

getch();

}

f(a,b)=3a b -|a-b| +e 2 2a+1

#include"conio.h"

#include"math.h"

#include"stdio.h"

void main() {

clrscr();

float x,f,a,b;

printf ("\nBan hay nhap x");

if (x<1) a=abs(x*x-3*x+2)+sin(2*x-1);

else if (1<=x<=2) a=sqrt(x*x-1)-log(x-1)/log(3);

else a=exp(2*x+3)-pow(x,5)+3;

b=pow(x,5)-3*x*x+2;

f=3*a*a*b-abs(a-b)+exp(2*a+1);

printf ("\nGia tri bieu thuc la: %f",f);

getch();

}

Trang 7

1 ) 1 .(

! 3

1

!

2

1

!

1

n









#include<stdio.h>

#include<conio.h>

#include<math.h>

float s=0;int n,i,gt=1;

void main()

{clrscr();

printf("\nnhap n=");scanf("%d",&n);

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

{gt=gt*i;

s=s+pow(-1,i+1)*(1/float(gt));

}

printf("\ntong co gia tri la:%4.1f",s);

getch();

}

nhập a,b,c thỏa mãn độ dài 3 cạnh tam giác

#include"stdio.h"

#include"conio.h"

#include"math.h"

void main()

{

clrscr();

float a,b,c;

int k;

k=0;

do

{

printf ("\nBan hay nhap a,b,c la do dai 3 canh

1 tam giac");

if

((a>0)&&(b>0)&&(c>0)&&(a+b>c)&&(b+c>

a)&&(c+a>b)) k=1;

if (k==0) printf ("\Ban hay nhap lai a,b,c");

}

while (k==0);

printf ("\nDo dai 3 canh cua tam giac ban vua

nhap la \na=%f\nb=%f\nc=%f",a,b,c);

getch();

}

chu vi, diện tích, đường cao tam giác

#include"stdio.h"

#include"conio.h"

#include"math.h"

void main()

{

clrscr();

float a,b,c,p,s;

int k;

k=0;

do { printf ("\nBan hay nhap a,b,c la do dai 3 canh

1 tam giac");

if (a>0)&&(b>0)&&(c>0)&&(a+b>c)&&(b+c>a )&&(c+a>b)) k=1;

if (k==0) printf ("\Ban hay nhap lai a,b,c"); }

while (k==0);

p=(a+b+c)/2;

s=sqrt(p*(p-a)*(p-b)*(p-c));

printf ("\nChu vi cua tam giac la %f",2*p); printf ("\nDien tich cua tam giac la %f",s); printf ("\nDo dai cua 1 duong cao la

%f",2*s/a);

getch();

}

mảng 1 chiều

#include"conio.h"

#include"stdio.h"

#include"math.h"

void nhap(int a[50],int *n) {

int i;

printf ("\nn=");scanf ("%d",n);

printf ("\nNhap cac phan tu trong day A:\n"); for (i=1;i<=*n;i++)

{ printf ("\nNhap phan tu thu %d= ",i);

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

} } void hienthi(int a[50],int n) {

int i;

printf ("\nDay A ban vua nhap la: ");

for (i=1;i<=n;i++) printf ("%d ",a[i]);

printf ("\n");

} void soam(int a[50],int n) {

int i,k,t;

k=0;

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

Trang 8

if (a[i]<0)

{

k=1;

t=i;

break;

}

if (k==0) printf ("\nDay A vua nhap khong co

so am");

else printf ("\nVi tri so am dau tien trong day

A tu trai sang phai la %d",t);

}

void slt2(int a[50],int n)

{

int i,j,tg;

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

{

if (a[i]>a[j])

{

tg=a[i];

a[i]=a[j];

a[j]=tg;

}

printf ("\nSo lon thu nhi trong day A la

%d",a[n-1]);

}

void xapxep(int a[50],int n)

{

int i,j,tg;

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

{

if ((a[i]%2==0)&&(a[j]%2!=0))

{

tg=a[i];

a[i]=a[j];

a[j]=tg;

}

printf ("\nDay A da xap xep la: ");

for (i=1;i<=n;i++) printf ("%d ",a[i]);

}

void kt(int a[50],int n)

{

int i,j,k;

k=0;

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

{

if (a[i]*a[j]<0) k=1;

else k=0;

}

if (k==1) printf ("\nDay A la day dan dau");

else printf ("\nDay A khong phai day dan dau");

} void tbc(int a[50],int n) {

int i,t;

float tbc;

t=0;

for (i=1;i<=n;i++) t=t+a[i];

tbc=(float)(t)/n;

printf ("\nTrung binh cong cac so trong day A

la %f",tbc);

} void so(int a[50],int n) {

int i,j,k;

k=0;

printf ("\nCac so trong day xuat hien nhieu hon mot lan la: ");

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

if (a[i]==a[j]) {

a[j]=a[j+1];

n=n-1;

k=1;

}

if (k==1) printf ("%d ",a[i]);

} } void snt(int a[50],int n) {

int i,j,tg,k;

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

if (a[i]>a[j]) {

tg=a[i];

a[i]=a[j];

a[j]=tg;

}

if (a[i]>a[j]) {

for (k=j;k<n;k++) a[k]=a[k+1];

n=n-1;

i=i-1;

} } void main() {

int a[50],n,k;

Trang 9

hienthi(a,n);

soam(a,n);

slt2(a,n);

xapxep(a,n);

kt(a,n);

tbc(a,n);

so(a,n);

snt(a,n);

getch();

}

mảng 2 chiều

#include<stdio.h>

#include<conio.h>

/*nhap mang hai chieu*/

void nhap(int A[10][10],int*n)

{int i,j,tg;

printf("nhap kich thuoc ma tran

n=");scanf("%d",n );

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

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

{

printf("nhap cac phan tu hang %d cot

%d=",i,j);

scanf("%d",&tg);

A[i][j]=tg;

}

/*hien thi A ra man hinh*/

void hienthi(int A[10][10],int n)

{

int i,j;

printf ("ma tran vua nhap:");

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

{

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

printf ("%3d",A[i][j]);

printf("\n");

}

/*tim phan tu nho nhat tren

ma tran*/

void sonhonhat(int A[10][10],int n)

{

int min,i,j;

min=A[1][1] ;

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

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

if (A[i][j]<min)min=A[i][j];

}

/*hien thi cac phan tu hang chan*/

void hienthihangchan(int A[10][10],int n)

{

int i,j;

printf ("cac phan tu tren cac hang co chi so chan \n:");

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

if (i%2==0) {

printf("\n cac phan tu tren hang %d",i);

for (j=1;j<=n;j++) printf ("%3d",A[i][j]);

printf("\n");

} }}

/*xap xep cac ham theo thu tu tang dan*/

void xapxephang(int A[10][10],int n) {

int i,j,k,tg;

printf ("nhap hang k=");

scanf ("%d",k);

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

if (A[k][i]<A[k][j]) {

A[k][i]=A[k][j];

A[k][j]=tg;

} printf ("ma tran sau khi xap xep hang %d",k); for (i=1;i<=n;i++)

{ for (j=1;j<=n;j++) printf ("%3d",A[i][j]);

printf("\n");

}}

/*voi k mot so bat ky nhap tu ban phim in ra so lan xuat

hien cua k trong ma tran*/

void solanxuathien(int A[10][10],int n) {

int k ,d,i,j;

printf ("nhap k=");

scanf("%d",&k);

d=0;

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

if (A[i][j]==k)d++;

printf("so lan xuat hien cua %d trong ma tran

la %d,k,d");

}

/*tim phan tu nho nhat tren duong cheo chinh ma tran*/

void phantunhonhat(int A[10][10],int n) {

int min,i,j;

min= A[1][1];

Trang 10

for (i=2;i<=n;i++)

if (A[i][j]<min ) min =A[i][j];

printf ("so nho nhat la %2d",min);

}

/*tinh va in ra trung binh cong cac

phan tu

tren duong cheo ma tran*/

void tcc(int A[10][10],int n)

{

int i,t=0;

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

t=t+A[i][i];

printf ("trung binh cong cac phan tu tren

duong cheo chinh=%35.1f",(float)n);

}

/*tich hai ma tran*/

void tich(int A[10][10],int B[10][10],int n)

{

int C[10][10],i,j,k;

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

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

{

C[i][j]=0;

for (k=1;k<=n;k++)C[i][j]=A[i][j]*B[i][j];

printf ("tich hai ma tran la %f",C[i][j]);

}

/*in ra man hinh cac phan tu trong

vung duoc danh dau

cua ma tran A*/

void in( int A[10][10],int n)

{

int i,j;

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

{ for (j=1;j<=n;j++)

printf ("%3d",A[i][j]);

printf ("\n");

}

/*so sanh cac phan tu am va phan

tu duong trong ma tran*/

void sosanh(int A[10][10],int n)

{

int dd,da,i,j;

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

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

if (A[i][j]<0)da++;

else if (A[i][j]>0)dd++;

if (da>dd)printf ("so luong phan tu am lon

hon");

else printf("so luong phan tu am nho hon hoac

bang so luong phan tu duong");

}

/*in ra man hinh hang co tong lon

nhat*/

void inhangmax(int A[10][10],int n) {

int max,h,i,j,t;

t=0;

for (i=1;i<=n;i++) t=t+A[1][i];max=t,h=1;

for (i=2;i<=n;i++) {t=0;

for (j=1;j<=n;j++) t=t+A[i][j];

if (t>max){max=t;h=i;}

for (i=1;i<=n;i++) printf("%2d",A[h][i]);

} } void main() {

clrscr();

int A[10][10],n;

nhap(A,&n);

hienthi(A,n);

hienthihangchan(A,n);

xapxephang(A,n);

getch();

}

ma trận vuông

#include<stdio.h>

#include<conio.h>

int a[15][15];

int i,j;

void main() {clrscr();

for(j=0;j<=9;j++) {a[0][j]=j;printf("%3d",a[0][j]);}

printf("\n");

i=1;

while(i<=9) {for(j=0;j<=9;j++) {a[i][j]=a[i-1][j]+10;

printf("%3d",a[i][j]);

} printf("\n");

i++;

} getch();

}

Định dạng
Số trang	10
Dung lượng	147 KB