3, 4, 5
3.1.
3.2.
3.3.
:
- for, while do-while ;
- ;
- ( ) ;
- for, while do-while ;
- setw (. ).
1.
do while, ? (y/n) . , . , (, ).
2.
, setprecision(n) .
3.
, .
, (: 0.001, 0.0001,, 0.000001).
, pi, e, math.h. ++, . #include <math.h> #define _USE_MATH_DEFINES. math.h.
(3.1)
#include "stdafx.h"
#include <iostream>
#include <conio.h>
#include <cmath>
#include <Windows.h>
#include <stdlib.h>
#include <time.h>
#include <clocale>
using namespace std;
#include <iomanip>
#define N 20
int main()
{int mas[N]={0};
char ch;
do
{int a,b;
setlocale(LC_CTYPE, "rus"); //
srand(time(NULL));
cout<<" :";
cin>>a>>b;
for (int i=0; i<N; i++)
{mas[i]=a+rand()%(b-a+1);
cout<<"mas["<<setw(2)<<i<<"]="<<mas[i]<<endl; //
|
|
|
}
cout<<" :"<<endl;
for (int i=0; i<N; i++)
cout<<setw(8)<<mas[i];
cout<<endl;
_getch();
cin>>ch;
} while ((ch=='Y')||(ch=='y'));
return 0;
}
1. - 3.1.
2. a b.
3. .
4. .
. -.
ios, . .
, . , ( ) ( ) (<< >>). , , ( ), .
, hex cout . :
cout << "\n : "<< 15 << hex;
cout << "\n : "<< 15;
:
: 15
: 0xF
, hex cout. 15 .
( ) , . . . , . , hex, oct, dec:
cout << 15 << hex << 15 << oct << 15 << dec<< 15;
:
150xF01715
- ++ : .
:
dec - ;
hex - ;
oct - ;
ws - (, '\t ' \v, '\n', '\r', \f);
endl - , ( ) ;
|
|
|
ends - ;
flush - , .. ( ).
left - ( );
right - ( );
fixed - ( float, double) , .
, , , ws ; endl, ends, flush - .
dec, hex, oct, , , .
endl , . , :
cout << "! ." << endl;
endl , cout .
iomanip:
setbase(int n);
(n) . n : 8, 10 16.
resetiosflags(long L)
() L ( );
setiosflags(long L)
( ) - ( );
setfill(int n)
n -, .
setprecision(int n)
n , .. .
setw(int n)
n .
. , setw(int n) , .
