Some methods of cout formatting

There are many ways to format cout, compared to printf in C, which is easier to understand in the way it is implemented.

1, counting into the system.

1, 16 binary: Hex

2, octal: Oct

3, decimal: Dec (default)

There are two types of formats that can be used when controlling the binary:

(1) Hex (cout); It can also be an Oct (cout) or Dec (cout)

(2) cout<

Example code:

　　

1#include <cstdio>2#include <iostream>3#include <ctime>4#include <fstream>5#include <ostream>6 using namespacestd;7 8 9 intMain () {Ten     Const intN = -; One     //The first method of implementation A Hex (cout); -cout<<"Hex:"<<N<<Endl; - Oct (cout); thecout<<"Oct:"<<N<<Endl; - Dec (cout); -cout<<"Dec:"<<N<<Endl; -     //The second way of realization +cout<"Hex:"<<N<<Endl; -cout<<oct<<"Oct:"<<N<<Endl; +cout<<dec<<"Dec:"<<N<<Endl; A return 0;  at}

2, adjust the sub-width

Cout.width (int width); Only one project at a time

Example code:

1#include <cstdio>2#include <iostream>3#include <ctime>4#include <fstream>5#include <ostream>6 using namespacestd;7 8 9 intMain () {Ten     //cout<<width (5) <<12<<endl; OneCout.width ( A); Acout<<121212121<<Endl; -     return 0;  -}

3. Fill characters:

Cout.fill (char t);

Example code:

 #include <cstdio> #include  <iostream>  #include  <ctime> #include  < Fstream> #include  <ostream>using  namespace   Std;  int   Main () {Cout.fill ( "  *   " );    Cout.width ( 12  );    cout  <<12  <<ENDL;  return  0  ;}  

4, set the precision of floating point number:

cout.precision (int bit);

Example code:

#include <iostream>usingnamespace  std; int Main () {    cout.precision (2);    cout<<1.233<<Endl;     return 0 ;}

5, print the end of the 0 and the decimal point

COUT.SETF (Ios_base::showpoint);

Example code:

 1  #include <iostream>2  using  namespace   Std;  3   Main () { 4   COUT.SETF (ios_base:: Showpoint);  5  cout<<endl;  6  cout<<endl;  7  return  0   8 } 

6. Parameters of the SETF () function (single parameter version)

(1) Ios_base::boolalpha displays a string value of type bool (TRUE/FALSE)

(2) ios_base::showbase display numeric cardinality prefix (octal prefix 0, hex prefix 0x)

(3) Ios_base::showpoint shows the decimal point and the end of the 0

(4) Ios_base::uppercase for hexadecimal number display capital letters

(5) Ios_base::showpos Display the preceding + sign for positive numbers (base 10 o'clock)

Some methods of cout formatting