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4.1, . 4.3.
8 58 9 4.1. !6:; Ex04_01.cpp
#include "stdafx.h" |
// ^=; setlocale. |
#include <locale.h> |
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#include <iostream> |
// AQRQPQ<DK <<Q^-<D<Q^. |
#include <iomanip> |
// ^=; CH?@Ab=;RQBQ<. |
#include <cmath> |
// ^=; CHR>CHR@J>FP@E ab?Pc@@. |
using namespace std; |
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/////////////////////////////////////////////////////////
//
void _tmain()
{
setlocale(LC_CTYPE, "Russian_Russia.1251"); double eps = 1.0E-12; // QJ>?f CH=>?fPQ> J@F=Q. double a, b, c;
// ‚<Q^ ^H??DE.
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cout << "]QŒaa@c@>?R a> "; cout << "]QŒaa@c@>?R b> "; cout << "]QŒaa@c@>?R c> ";
cin >> a; cin >> b; cin >> c;
// ‚DJ@F=>?@> ^@FPB@C>?H?RH. double D = b * b - 4.0 * a * c; if(fabs(D)<eps)
cout << "pBH<?>?@> @C>>R ^<H " "Q^@?HPQ<DE <>{>FR<>??DE PQB?;.";
else
cout << "pBH<?>?@> ?> @C>>R ^<bE " "Q^@?HPQ<DE <>{>FR<>??DE PQB?>K.";
cout << endl;
// †^>C ?HkHR@; =m9QK P=H<@w@ P=H<@HRbBD. system("pause");
}
D. 4.3. D Ex04_01
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D. 4.4. - ( 4.2)
89
8 58 9 4.2. !6:; Ex04_02.cpp
#include "stdafx.h" |
// ^=; setlocale. |
#include <locale.h> |
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#include <iostream> |
// AQRQPQ<DK <<Q^-<D<Q^. |
#include <iomanip> |
// ^=; CH?@Ab=;RQBQ<. |
#include <cmath> |
// ^=; CHR>CHR@J>FP@E ab?Pc@@. |
using namespace std; |
|
/////////////////////////////////////////////////////////
//
void _tmain()
{
setlocale(LC_CTYPE, "Russian_Russia.1251"); int x, y;
cout << "‚<>^@R> J@F=Q < ^@HAHIQ?> QR 1 ^Q 4> "; cin >> x;
switch (x)
{
case 1:
cout << "x=1"; y = 10; break;
case 2: case 3:
cout << "x=2 @=@ x=3"; y = -10;
break; case 4:
cout << "x=4"; y = 20; break;
default:
cout << "e>AB>^bFCQRB>??Q> I?HJ>?@> x"; y = -20;
break;
}
cout << endl << "y=" << y << endl;
// †^>C ?HkHR@; =m9QK P=H<@w@ P=H<@HRbBD.
90
system("pause");
}
D. 4.5. D Ex04_02
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