std::setiosflags

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When used in an expression out << setiosflags(mask) or in >> setiosflags(mask), sets all format flags of the stream out or in as specified by the mask.

List of all std::ios_base::fmtflags :

dec - use decimal base for integer I/O
oct - use octal base for integer I/O
hex - use hexadecimal base for integer I/O
basefield - dec|oct|hex|0 useful for masking operations
left - left adjustment(add fill characters to the right)
right - right adjustment (adds fill characters to the left)
internal - internal adjustment (adds fill characters to the internal designated point)
adjustfield - left|right|internal. Useful for masking operations
scientific - generate floating point types using scientific notation, or hex notation if combined with fixed
fixed - generate floating point types using fixed notation, or hex notation if combined with scientific
floatfield - scientific|fixed|(scientific|fixed)|0. Useful for masking operations
boolalpha - insert and extract bool type in alphanumeric format
showbase - generate a prefix indicating the numeric base for integer output, require the currency indicator in monetary I/O
showpoint - generate a decimal-point character unconditionally for floating-point number output
showpos - generate a \+ character for non-negative numeric output
skipws - skip leading whitespace before certain input operations
unitbuf flush the output after each output operation
uppercase - replace certain lowercase letters with their uppercase equivalents in certain output output operations

Example of manipulators:

#include <iostream>
#include <string>
#include<iomanip>
int main()
{
  int l_iTemp = 47;
  std::cout<<  std::resetiosflags(std::ios_base::basefield);
  std::cout<<std::setiosflags( std::ios_base::oct)<<l_iTemp<<std::endl;
  //output: 57
  std::cout<<  std::resetiosflags(std::ios_base::basefield);
  std::cout<<std::setiosflags( std::ios_base::hex)<<l_iTemp<<std::endl;
  //output: 2f
  std::cout<<std::setiosflags( std::ios_base::uppercase)<<l_iTemp<<std::endl;
  //output 2F
  std::cout<<std::setfill('0')<<std::setw(12);
  std::cout<<std::resetiosflags(std::ios_base::uppercase);
  std::cout<<std::setiosflags( std::ios_base::right)<<l_iTemp<<std::endl;
  //output: 00000000002f
  
  std::cout<<std::resetiosflags(std::ios_base::basefield|std::ios_base::adjustfield);
  std::cout<<std::setfill('.')<<std::setw(10);
  std::cout<<std::setiosflags( std::ios_base::left)<<l_iTemp<<std::endl;
  //output: 47........
  
  std::cout<<std::resetiosflags(std::ios_base::adjustfield)<<std::setfill('#');
  std::cout<<std::setiosflags(std::ios_base::internal|std::ios_base::showpos);
  std::cout<<std::setw(10)<<l_iTemp<<std::endl;
  //output +#######47
  
  double l_dTemp = -1.2;
  double pi = 3.14159265359;
  std::cout<<pi<<"    "<<l_dTemp<<std::endl;
  //output +3.14159   -1.2
  std::cout<<std::setiosflags(std::ios_base::showpoint)<<l_dTemp<<std::endl;
  //output -1.20000
  std::cout<<setiosflags(std::ios_base::scientific)<<pi<<std::endl;
  //output: +3.141593e+00
  std::cout<<std::resetiosflags(std::ios_base::floatfield);
  std::cout<<setiosflags(std::ios_base::fixed)<<pi<<std::endl;
  //output: +3.141593
  bool b = true;
  std::cout<<std::setiosflags(std::ios_base::unitbuf|std::ios_base::boolalpha)<<b;
  //output: true
  return 0;
}

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