: |
bool -> char -> short-int-unsigned int-long-unsigned long-float-double-long double
, , . unsigned int int 2 . , : bool, short, char. int. ( ). . . , . int I=27; short S=2; float F = 22.3; bool B = false; I-F+S*B ? ³ , . int-float+short*bool. , short bool int. int-float+int*int. float = 0. int, . int-float float. :
- , .
float. float rez = I-F+S*B; // 27-22.3+*0 cout << rez << endl; // = 4,7 , . .
, .
int i=3; int j=2; cout << i / j; // = 1. int , float. : int i=3; int j=2; cout << (float) i / j; // 1.5
. . /. , .
, . |
| ++. 5. . '. . |
| Joker | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| , 10 2014 00:19 : 2680 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
- ,
'.
,
.
:
1. г i/
2. .
3. .
4. ' .
г /.
, 1, . , . 5++; . a++; , a = 5;. , (--a; a--;), ? .
: --a; ++a;
: a--; a++;
1:
int a = 8;
cout << a; // 8
a++;
cout << a; // 9
++a;
cout << a; // 10
. .
int a = 8;
cout << ++a; // 9
cout << a++; // 9
cout << a; // 10
, ( ) / 1.
cout << a++; .
ᒺ . , A 5 10, 2 . >=5 A<=10. , .
A>=5 && A<=10.
(&&) ᒺ 2 , true () false (). true, false
true , true. true - , (true). False 0, -1 䒺 - true. 5-10 #include <iostream> #include <conio.h> using namespace std; int main() { setlocale(LC_CTYPE, "ukr"); double a; cout << "i --> "; cin >> a;
cout << ((a >= 5) && (a <= 10)) << endl;
cout << " 0 - i." << endl; cout << " 1 - i." << endl;
_getch(); return 0; }
(||) ᒺ 2 (true) , . false, false. , true, ( ) .
a 5 10. . view source print? #include <iostream> #include <conio.h> using namespace std; int main() { setlocale(LC_CTYPE, "ukr"); float a; cin >> a; cout << ((a <= 5) || (a >= 10)) << endl; cout << " 0 - i 5 10"<< endl; cout << " 1 - i 5 10" << endl;
_getch(); return 0; }
(!) , ᒺ ( ). ³ .
true false false true.
|
| ++. 6. if switch. |
| Joker |
| , 21 2014 23:09 : 2737 |
:
1. if
2. switch
3. .
if
 . if .
.
if (__)
{
_1;
}
else
{
_2;
}
__ .
_1 , __ true.
_2 , __ false.
_1, _2 .
_2, _1.
.
#include <iostream>
#include <conio.h>
using namespace std;
int main ()
{
int n,x;
cin >> n >> x;
if (n>x)
{
cout << "n > x" << endl;
}
else
{
cout << "x>n" << endl;
}
_getch();
retrun 0;
}
:
5 10 (5<x<10)? 2 :
1) X>5 2) X<10
, , ᒺ. :
If (X>5 && X<10)
r
:
, 쳺 :
if (a-b)
. , -b. true false.
, false = 0 true!=0
, a-b = 0, else. a-b 0, if.
:
, () , :
if(a == b)
()
if(a = b)
, if else, . else . :
if ()
{
_1
}
//
:
if ()
{
_1
}
Else
{ }
//
if-else
. , . , 500 ., 5%. 1000 , - 10 %. , . .
if-else.
:
if (_1)
{
_1
}
else if (_2)
{
_2
}
else
{
_3
}
(else if ()). 5-8 - , . , - . , - 4 5, 8 9. _1, _2, _3, , . ( ).
.
#include <iostream>
using namespace std;
int main ()
{
setlocale (LC_CTYPE, "ukr");
double price, discount;
cout << " --> ";
cin >> price;
cout << "\n" << " = ";
if (price >= 500 && price < 1000)
{
discount = 5;
cout << discount << "%" << endl;
}
else if (price >= 1000)
{
discount = 10;
cout << discount << "%" << endl;
}
else
{
discount = 0;
cout << discount << "%" << endl;
}
cout << " = " << price - (price * (discount / 100)) << endl;
return 0;
}
switch
, if-else. - . if switch. , if. 3 . if, switch . .
:
switch ()
{
case _1:
ij_1;
break;
case _2:
ij_2;
break;
default:
_;
}
, default: break;. .
. . .
_1 . _1 = 1. _1 1. , ( ) 1. , _1. , case. , default. ( )
switch(a)
{
case '!':
cout << "1" <<endl;
break;
case '@':
cout << "@" << endl;
break;
default:
cout << "^^^^" << endl;
}
if, .
:
? ij_1: ij_2;
. .
:
view source
print?
#include <iostream>
using namespace std;
int main ()
{
int b;
cin >> b;
(
(b!=0)? cout << "Yes": cout << "No";
b 0, Yes, b = 0 No.
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: 2017-02-25; !; : 290 |
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