Cpp - cout Output numbers

Introduction

Manipulator	Effects
oct	Octal base
hex	Hexadecimal base
dec	Decimal base (by default)
showpos	Generates a + sign in non-negative numeric output.
noshowpos	Generates non-negative numeric output without a + sign (by default).
uppercase	Generates capital letters in hexadecimal output.
nouppercase	Generates lowercase letters in hexadecimal output (by default).

The following code reads integral decimal values and generates octal, decimal, and hexadecimal output.

Demo

#include <iostream>     // Declarations of cin, cout and 
using namespace std;    // manipulators oct, hex, ... 

int main() /*from www  .j  a  va  2 s .c om*/
{ 
    int number; 
    cout << "Please enter an integer: "; 
    cin >> number; 
    cout << uppercase                           // for hex-digits 
           << " octal  \t decimal  \t hexadecimal\n " 
           << oct << number << "       \t " 
           << dec << number << "       \t " 
           << hex << number << endl; 
    return 0; 
}

Result

Related Topics

• Output number in oct, hex, and dec
• Output Positive Negative Numbers
• Output floating-point numbers
• Output Number Precision
• Output float value with precision settings

Exercise

• Write program to left-justify the number 0.123456 in an output field with a width of 15
• Write program to output 23.987 as a fixed point number rounded to two decimal places.
• Write program to Output number -123.456 as an exponential and with four decimal spaces.
• Write program to display number as a decimal, an octal, and a hexadecimal

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