Các bài tập c căn bản

/* Bai tap 1_93 - In tat ca cac uoc so cua so n */ #include #include void main() { int n, i; printf("Cho gia tri N = "); scanf("%d", &n); printf("Cac uoc so cua %d la :\n", n); for (i=1; im) n -= m; else m -= n; if (n == 0) return m; else return n;

printf("Cac uoc so cua %d la :\n", n);

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

scanf("%u%u", &n, &m);

printf("\nUSCLN cua %u va %u = %u", n, m, USCLN(n,m));printf("\nBSCNN cua %u va %u = %u", n, m, BSCNN(n,m));getch();

char filename[50], s[255], *hang[1000], c;

int nline = 0, line = 0, i;

printf("\nNhap ten tap tin muon xem : ");

#pragma warn -pia

char *trim(char *chuoi)

long i, j, k, l, m, count=0, soluong = 0;

for (i=0; i<=TONGSOTIEN/1000; i++)

for (i=x1 + 1; i < x2; i++)

int x1, y1, x2, y2, type, color;

cprintf("\n\rDRAWBOX DEMO.\n\rPress any key to begin ");getch();

double fahrenheit, celsius;

printf("\nNhap gia tri do Fahrenheit : ");

int n, i, fib1 = 1, fib2 = 1, fib = 2;

printf("\nNhap gia tri N : ");

char s[100], s1[100], s2[100], filename1[50], filename2[50];FILE *fp1, *fp2;

printf("\nCho viet ten tap tin thu nhat : ");

printf("\nNhap cac phan tu cua mang : ");

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

printf("\nNhap vao 10 phan tu nguyen cua day : ");

for (i=0; i<10; i++)

#define MAX 100

void main()

{

unsigned long nguyento[MAX], i, j, l, k=0, n;

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

unsigned long gthua = 1;

printf("\nNhap gia tri N : ");

-/* Bai tap 2_8 - In so Hex tuong ung voi mot so nguyen duong */

#include <stdio.h>

void main()

{

unsigned number;

char hex[] = "0123456789ABCDEF";

printf("\nNhap vao mot gia tri nguyen duong 16 bit : ");

printf("\n1 Hinh tam giac");

printf("\n2 Hinh tron");

printf("\n3 Hinh vuong");

printf("\n4 Hinh chu nhat");

printf("\n\nNhap vao ba canh tam giac : ");

scanf("%d%d%d", &a, &b, &c);

printf("\nChu vi tam giac = %d", a+b+c);

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

printf("\nDien tich tam giac = %lf", sqrt(p*(p-a)*(p-b)*(p-c)));

printf("\nChu vi hinh tron = %d", 4 * a);

printf("\nDien tich hinh vuong = %d", a * a);getch();

printf("\nCho biet so phan tu (N < 10) : ");

printf("\nNhap vao cac he so a,b,c,d,e,f : ");

scanf("%d%d%d%d%d%d", &a, &b, &c, &d, &e, &f);dthuc = b*d - e*a;

int n, tram, chuc, donvi;

printf("\nNhap vao mot so tu 100 - 999 : ");

printf("\nSo hang tram = %d", tram);

printf("\nSo hang chuc = %d", chuc);

printf("\nSo hang don vi = %d", donvi);

} while (!((c=='\r') && (sonhap[0] != 0) && (sonhap[1] != 0)

&& (sonhap[2] != 0) && (sonhap[3] != 0)));

cprintf(" Ket qua dung = ");

for (i=0; i<4; i++)

printf("\nChuoi da duoc giai ma : %s", chuoi);

int i, minval, maxval;

/* Khoi tao mang ngau nhien */

randomize();

for (i=0; i<20; i++)

mang[i] = random(100);

/* Tim gia tri lon nhat va nho nhat */

minval = maxval = mang[0];

for (i=1; i<20; i++)

-/* Bai tap 1_70 - Ma hoa 1 file bang phep XOR */

#include <stdio.h>

void main()

{

char c, filein[50], fileout[50], key;

FILE *fpin, *fpout;

printf("\nCho biet ten tap tin nguon : ");

if ((fpin = fopen(filein, "r")) == NULL)

printf("Khong tim thay tap tin %s", filein);

/* Khoi tao mang ngau nhien */

randomize();

for (i=0; i<10; i++)

for (j=0; j<10; j++)

matran[i][j] = random(10) + 1;

/* Tinh tong cac hang */

for (i=0; i<10; i++)

/* Tinh tong duong cheo chinh */

for (i=0; i<10; i++)

cprintf("\n\r\n\rTong cac phan tu nho hon 6 = %3d", count);getch();

fprintf(stderr, "Khong the mo tap tin %s\n", sf2);

if ((fpout = fopen(sfout, "w")) == NULL)

fprintf(stderr, "Khong the mo tap tin %s\n", sfout);while ((c = getc(fp1)) != EOF)

typedef struct tagphanso {int tuso, mauso;

} PHANSO;

c.tuso = a.tuso * b.tuso;

c.mauso = a.mauso * b.mauso;

c.tuso = a.tuso * b.mauso;

c.mauso = a.mauso * b.tuso;

c = uocluoc(c);

return c;

}