13.7.6. Uppercase/Lowercase Control (uppercase)

Stream manipulator uppercase outputs an uppercase X or E with hexadecimal-integer values or with scientific notation floating-point values, respectively (Fig. 13.19). Using stream manipulator uppercase also causes all letters in a hexadecimal value to be uppercase. By default, the letters for hexadecimal values and the exponents in scientific notation floating-point values appear in lowercase. To reset the uppercase setting, output the stream manipulator nouppercase.

Click here to view code image

 1   // Fig. 13.19: fig13_19.cpp
 2   // Stream manipulator uppercase.
 3   #include <iostream>
 4   using namespace std;
 5
 6   int main()
 7   {
 8      cout << "Printing uppercase letters in scientific" << endl
 9         << "notation exponents and hexadecimal values:" << endl;
10
11      // use std:uppercase to display uppercase letters; use std::hex and
12      // std::showbase to display hexadecimal value and its base
13      cout << uppercase << 4.345e10 << endl
14         << hex << showbase << 123456789 << endl;
15   } // end main

Printing uppercase letters in scientific
notation exponents and hexadecimal values:
4.345E+010
0X75BCD15

Fig. 13.19. Stream manipulator uppercase.

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