Sams Teach Yourself C++ in 21 Days

Working with Streams 621

17

%l longinteger

%ld double

%f float

Each of the conversion specifiers can also provide a width statement and a precision

statement, expressed as a float, where the digits to the left of the decimal are used for

the total width, and the digits to the right of the decimal provide the precision for floats.

Thus,%5dis the specifier for a 5-digit-wide integer, and %15.5fis the specifier for a 15-

digit-wide float, of which the final five digits are dedicated to the decimal portion.

Listing 17.15 illustrates various uses of printf().

LISTING17.15 Printing with printf()

0: //17.15 Printing with printf()

1: #include <stdio.h>

2:

3: int main()

4: {

5: printf(“%s”,”hello world\n”);

6:

7: char *phrase = “Hello again!\n”;

8: printf(“%s”,phrase);

9:

10: int x = 5;

11: printf(“%d\n”,x);

12:

13: char *phraseTwo = “Here’s some values: “;

14: char *phraseThree = “ and also these: “;

15: int y = 7, z = 35;

16: long longVar = 98456;

17: float floatVar = 8.8f;

18:

19: printf(“%s %d %d”, phraseTwo, y, z);

20: printf(“%s %ld %f\n”,phraseThree,longVar,floatVar);

21:

22: char *phraseFour = “Formatted: “;

23: printf(“%s %5d %10d %10.5f\n”,phraseFour,y,z,floatVar);

24:

25: return 0;

26: }

TABLE17.2 continued