Visual C++ and MFC Programming 2nd Edition

Chapter 9 Strings Visual C++ and MFC Fundamentals

the separator

g double

Representation of a number using either the e

or the f format

G double

Representation of a number using either the E

or the f format

s String String representation

S String String representation

An example would be:

char Represents[20];

sprintf(Represents, "%f", );

If you want to display your own, unformatted words as part of the new string, you can

type anything before the % operator or after the formatting character:

char Represents[20];

sprintf(Represents, "The number is %f", );

If you are formatting a floating point number, you can specify the number of digits to

appear as the separator. To do this, type a period on the right side of the % symbol

followed by a number. For example, to produce a number with a precision of 4 digits,

you would type:

sprintf(Represents, "The number is %.4f", );

To create a longer or more advanced string, you can add as many combinations of % and

characters as necessary.

The % symbol used in the S argument is used as a place holder, informing the compiler

that an external value will be needed for that position. To specify a value for a place

holder, provide it as a third argument. Here is an example:

void CExerciseView::OnDraw(CDC* pDC)

{

CExerciseDoc* pDoc = GetDocument();

ASSERT_VALID(pDoc);

char Represents[20];

double Number = 125.55;

sprintf(Represents, "The number is %.4f", Number);

}

If you created more than one combination of % and character, you can provide a value

for each, separated by a comma. Here is an example:

void CExerciseView::OnDraw(CDC* pDC)

{

CExerciseDoc* pDoc = GetDocument();

ASSERT_VALID(pDoc);

char FirstName[] = "Ferdinand";

char LastName[] = "Coly";

char FullName[40];

sprintf(FullName, "Full Name: %s %s", FirstName, LastName);