#include<stdio.h>
#include<limits.h>

int main()
{
    // 使用打印标准头文件中的相应值的方式
    printf("使用标准头文件中的相应值:\n");
    printf("signed char 取值范围: %d 到 %d\n", SCHAR_MIN, SCHAR_MAX);
    printf("unsigned char 取值范围: 0 到 %u\n", UCHAR_MAX);
    printf("signed short 取值范围: %d 到 %d\n", SHRT_MIN, SHRT_MAX);
    printf("unsigned short 取值范围: 0 到 %u\n", USHRT_MAX);
    printf("signed int 取值范围: %d 到 %d\n", INT_MIN, INT_MAX);
    printf("unsigned int 取值范围: 0 到 %u\n", UINT_MAX);
    printf("signed long 取值范围: %ld 到 %ld\n", LONG_MIN, LONG_MAX);
    printf("unsigned long 取值范围: 0 到 %lu\n", ULONG_MAX);

    // 使用直接计算的方式
    printf("\n使用直接计算的方式:\n");                  // '~0'的结果是11111111,右移，01111111,char转为有符号类型
    printf("signed char 取值范围: %d 到 %d\n", -(char)((unsigned char)~0 >> 1) - 1, (char)((unsigned char)~0 >> 1));
    printf("unsigned char 取值范围: 0 到 %u\n", (unsigned char)~0);
    printf("signed short 取值范围: %d 到 %d\n", -(short)((unsigned short)~0 >> 1) - 1, (short)((unsigned short)~0 >> 1));
    printf("unsigned short 取值范围: 0 到 %u\n", (unsigned short)~0);
    printf("signed int 取值范围: %d 到 %d\n", -(int)((unsigned int)~0 >> 1) - 1, (int)((unsigned int)~0 >> 1));
    printf("unsigned int 取值范围: 0 到 %u\n", (unsigned int)~0);
    printf("signed long 取值范围: %ld 到 %ld\n", -(long)((unsigned long)~0 >> 1) - 1, (long)((unsigned long)~0 >> 1));
    printf("unsigned long 取值范围: 0 到 %lu\n", (unsigned long)~0);

    return 0;
}