Data Type Specifiers and Equivalents
This book generally uses the forms of the type specifiers listed in the following table rather than the long forms, and it assumes that the char type is signed by default. Therefore, throughout this book, char is equivalent to signed char.
Type Specifiers and Equivalents
Type Specifier |
Equivalent(s) |
|---|---|
signed char1 |
char |
signed int |
signed, int |
signed short int |
short, signed short |
signed long int |
long, signed long |
unsigned char |
— |
unsigned int |
unsigned |
unsigned short int |
unsigned short |
unsigned long int |
unsigned long |
float |
— |
long double2 |
— |
1 When you make the char type unsigned by default (by specifying the /J compiler option), you cannot abbreviate signed char as char.
2 In 32-bit operating systems, the Microsoft C compiler maps long double to type double.
Microsoft Specific
You can specify the /J compiler option to change the default char type from signed to unsigned. When this option is in effect, char means the same as unsigned char, and you must use the signed keyword to declare a signed character value. If a char value is explicitly declared signed, the /J option does not affect it, and the value is sign-extended when widened to an int type. The char type is zero-extended when widened to int type.
END Microsoft Specific