Quote:

 

#include <stdio.h>

void main()
{
float a, b;

printf("\nGiai phuong trinh bac nhat AX + B = 0");
printf("\nCho biet ba he so A B : ");
scanf("%f%f", &a, &b);

if (a==0)
if (b!=0)
printf("Phuong trinh vo nghiem");
else
printf("Phuong trinh co nghiem khong xac dinh");
else
printf("Dap so cua phuong trinh tren = %f", -b/a);
getch();
}

Quote:

 

#include <stdio.h>
#include <math.h>

void main()
{
double a, xn, ketqua;

printf("\nNhap vao so muon tinh can bac hai : ");
scanf("%lf", &a);
xn = (a+1)/2;
do {
ketqua = xn;
xn = 0.5 * (xn + a/xn);
} while (fabs(xn-ketqua) > 0.0001);
printf("\nKet qua = %lf", xn);
getch();
}

Quote:

 

#include <math.h>

typedef struct tagcomplex {
float thuc, ao;
} complex;

complex tong(complex a, complex
{
complex c;
c.thuc = a.thuc + b.thuc;
c.ao = a.ao + b.ao;
return c;
}

complex hieu(complex a, complex
{
complex c;
c.thuc = a.thuc - b.thuc;
c.ao = a.ao - b.ao;
return c;
}

complex tich(complex a, complex
{
complex c;
c.thuc = a.thuc*b.thuc - a.ao*b.ao;
c.ao = a.thuc*b.ao + a.ao*b.thuc;
return c;
}

complex thuong(complex a, complex
{
complex c;
float tongbp;
tongbp = b.thuc*b.thuc + b.ao*b.ao;
c.thuc = (a.thuc*a.ao + b.thuc*b.ao)/tongbp;
c.ao = (a.ao*b.thuc - a.thuc*b.ao)/tongbp;
return c;
}

float argument(complex a)
{
return acos(a.thuc/sqrt(a.thuc*a.thuc + a.ao*a.ao));
}

float modul(complex a)
{
return sqrt(a.thuc*a.thuc + a.ao*a.ao);
}

void print_complex(complex a)
{
printf("%.2f + %.2fi", a.thuc, a.ao);
}

void main()
{
complex a, b, c;
printf("\nNhap he so thuc va phuc cua A : ");
scanf("%f%f", &a.thuc, &a.ao);
printf("\nNhap he so thuc va phuc cua B : ");
scanf("%f%f", &b.thuc, &b.ao);
printf("\nSo phuc A = ");
print_complex(a);
printf("\nSo phuc B = ");
print_complex( ;
printf("\nTong cua chung = ");
c = tong(a, ;
print_complex©;
printf("\nHieu cua chung = ");
c = hieu(a, ;
print_complex©;
printf("\nTich cua chung = ");
c = tich(a, ;
print_complex©;
printf("\nThuong cua chung = ");
c = thuong(a, ;
print_complex©;
printf("\nArgument cua a = %f", argument(a));
printf("\nModul cua a = %f", modul(a));
getch();
}

Quote:

 

#include <stdio.h>

void main()
{
int a[10], i, maxstart, maxend, maxlen, tmpstart, tmpend, tmplen;

printf("\nNhap vao 10 phan tu nguyen cua day :");
for (i=0; i<10; i++)
scanf("%d", &a);
printf("Day da cho :\n");
for (i=0; i<10; i++)
printf("%6d", a);

maxstart = maxend = tmpstart = tmpend = 0;
maxlen = tmplen = 1;
for (i=1; i< 10; i++)
{
if (a < a[tmpend])
{
if (maxlen < tmplen)
{
maxstart = tmpstart;
maxend = tmpend;
maxlen = tmplen;
}
tmpstart = tmpend = i;
tmplen = 1;
}
else
{
tmplen++;
tmpend++;
}
}
if (maxlen < tmplen)
{
maxstart = tmpstart;
maxend = tmpend;
}
printf("\nDay tang co so phan tu nhieu nhat la : \n");
for (i=maxstart; i<=maxend; i++)
printf("%6d", a);
getch();
}