STM32 keil 下编程，各种数据类型的长度

源码：

void test_str2num(void)
{
    printf("\r\n\r\nint is %d",sizeof(int));
    printf("\r\nlong int is %d",sizeof(long int));
    printf("\r\nlong long int is %d",sizeof(long long int));
    printf("\r\nfloat is %d",sizeof(float));
    printf("\r\ndouble float is %d",sizeof(double));
    printf("\r\nchar is %d",sizeof(char));
    printf("\r\nshort is %d\r\n",sizeof(short));
    
}

输出显示：
int is 4
long int is 4
long long int is 8
float is 4
double float is 8
char is 1
short is 2

可以看到 int,long int,float 均为 4 字节。而 long long int 和 double 均为 8 字节。而 short 则为 2 个字节，char 为 1 个字节。