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#include <stdio.h>
#define PI 3.1415926
main()
{
int number=5, cost=11000, s=-777;
float bat=255, x=12.345;
printf (" pi %f.\n", PI);
printf (" %d%s.\n", cost,".");
printf ("x=%-8.4f s=%5d%8.2f ", x, s, x); }
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float grant;
char name[20];
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scanf ("%d%f", &course, &grant);
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# include <math.h>. x, y double. .
| x | sqrt(x) | arcsin(x) | asin(x) |
| |x| | fabs(x) | arccos(x) | acos(x) |
| ex | exp(x) | arctg(x) | atan(x) |
| xy | pow(x,y) | arctg(x/y) | atan2(x,y) |
| ln(x) | log(x) | sh(x)=1/2 (ex-e-x) | sinh(x) |
| lg10(x) | log10(x) | ch(x)=1/2 (ex+e-x) | cosh(x) |
| sin(x) | sin(x) | tgh(x) | tanh(x) |
| cos(x) | cos(x) | x y | fmod(x,y) |
| tg(x) | tan(x) | >=x | ceil(x) |
| <=x | floor(x) |
++ :
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| #include <iostream> using namespace std; int main() { int a, b; cout << "Vvedite pervoe chislo: "; cin >> a; cout << "Vvedite vtoroe chislo: "; cin >> b; if (a > b) // > b { cout << a << " > " << b << endl; // } if (a < b)// < b { cout << a << " < " << b << endl; } if (a == b) // = b cout << a << " = " << b << endl; // system("pause"); return 0; } |
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| #include <iostream> using namespace std; int main() { int count; // switch double a,b; // cout << "Vvedite pervoe chislo: "; cin >> a; cout << "Vvedite vtoroe chislo: "; cin >> b; cout << "Vibirite deistvie: 1-clojenie; 2-vichitanie; 3-ymnojenie; 4-delenie: "; cin >> count; switch (count) // switch { case 1: // count = 1 { cout << a << " + " << b << " = " << a + b << endl; // break; } case 2: // count = 2 { cout << a << " - " << b << " = " << a - b << endl; // break; } case 3: // count = 3 { cout << a << " * " << b << " = " << a * b << endl; // break; } case 4: // count = 4 { cout << a << " / " << b << " = " << a / b << endl; // break; } default: // count cout << "Nepravilni vvod" << endl; } system("pause"); return 0; } |
: a, b, c. ax4+bx2+c=0, . . , , .
|
|
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| //ax4+bx2+c=0, ay2+by+c=0, D=b2-4ac, (-bsqrt(D))/2*a #include <iostream> #include <cmath> using namespace std; int main(){ double a(4),x,c(1),b(-5),y; //4x4-5x2+1=0 int D; D=pow(b,2)-4*a*c; // if (D>0){ y= sqrt((-b+sqrt(D)) / (2*a)); cout<<y<<"\n"<<-y<<"\n"; y= sqrt((-b-sqrt(D)) / (2*a)); cout<<y<<"\n"<<-y<<"\n"; } if (D==0) { y=-b/2*a; cout<<y<<"\n"<<-y<<"\n"; } if (D<0) { cout<<"not ans\n"; } } |
X Y .
| #include <iostream> using namespace std; int main(){ int x,y; cout<<"X: "; cin>>x; cout<<"Y: "; cin>>y; if ((x%2) || (y%2)) cout<<"uneven numbers\n"; // else cout<<"even numbers\n"; // } |
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1 = 1, 20=20 , 3=3
