Data Type Ranges
C/C++ recognizes the types shown in the table below.
Type Name Bytes Other Names Range of Values
int * signed,
signed int System dependent
unsigned int * unsigned System dependent
__int8 1 char,
signed char –128 to 127
__int16 2 short,
short int,
signed short int –32,768 to 32,767
__int32 4 signed,
signed int –2,147,483,648 to 2,147,483,647
__int64 8 none –9,223,372,036,854,775,808 to 9,223,372,036,854,775,807
char 1 signed char –128 to 127
unsigned char 1 none 0 to 255
short 2 short int,
signed short int –32,768 to 32,767
unsigned short 2 unsigned short int 0 to 65,535
long 4 long int,
signed long int –2,147,483,648 to 2,147,483,647
unsigned long 4 unsigned long int 0 to 4,294,967,295
enum * none Same as int
操作系统的一个经典问题是"生产者-消费者"问题, 这涉及同步信号量和互斥信号量的应用, 在这里,我用线程的同步和互斥来实现.
/*
* author 张文
* 2008/06/20
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <pthread.h>
#include <semaphore.h> ......
