Keil MDK编译器的数据类型定义

 1 #include "usart.h"
 2 int main()
 3 {
 4     USART1_Config();    //串口初始化，以下信息通过串口打印
 5     printf("char: %d\r\n",sizeof(char));
 6     printf("unsigned char: %d\r\n",sizeof(unsigned char));
 7     printf("short: %d\r\n",sizeof(short));
 8     printf("unsigned short: %d\r\n",sizeof(unsigned short));
 9     printf("int: %d\r\n",sizeof(int));
10     printf("unsigned int: %d\r\n",sizeof(unsigned int));
11     printf("long: %d\r\n",sizeof(long));
12     printf("unsigned long: %d\r\n",sizeof(unsigned long));
13     printf("float: %d\r\n",sizeof(float));
14     printf("double: %d\r\n",sizeof(double));
15     while(1);
16 }

通过以上一段代码，得到了Keil MDK编译器对常用数据类型长度的定义。

结果如下：

char: 1
unsigned char: 1
short: 2
unsigned short: 2
int: 4
unsigned int: 4
long: 4
unsigned long: 4
float: 4
double: 8

Keil MDK编译器的数据类型定义