【C语言】练习2-1

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

int main()
{
    printf("采用打印标准头文件limits.h中的相应值：\n");
    //signed types
    printf("signed char min = %d\n", SCHAR_MIN);
    printf("signed char max = %d\n", SCHAR_MAX);
    printf("signed short min = %d\n", SHRT_MIN);
    printf("signed short max = %d\n", SHRT_MAX);
    printf("signed int min = %d\n", INT_MIN);
    printf("signed int max = %d\n", INT_MAX);
    printf("signed long min = %ld\n", LONG_MIN);
    printf("signed long max = %ld\n", LONG_MAX);
    //unsigned types
    printf("unsigned char max = %u\n", UCHAR_MAX);
    printf("unsigned short max = %u\n", USHRT_MAX);
    printf("unsigned int max = %u\n", UINT_MAX);
    printf("unsigned long max = %lu\n", ULONG_MAX);
    return 0;
}

#include <stdio.h>
//determine ranges of types
int main()
{
printf("采用直接计算的方式：\n");
//signed types
printf("signed char min = %d\n", -(char)((unsigned char)~0>>1)-1);
printf("signed char max = %d\n", (char)((unsigned char)~0>>1));
printf("signed short min = %d\n", -(short)((unsigned short)~0>>1)-1);
printf("signed short max = %d\n", (short)((unsigned short)~0>>1));
printf("signed int min = %d\n", -(int)((unsigned int)~0>>1)-1);
printf("signed int max = %d\n", (int)((unsigned int)~0>>1));
printf("signed long min = %ld\n", -(long)((unsigned long)~0>>1)-1);
printf("signed long max = %ld\n", (long)((unsigned long)~0>>1));
//unsigned types
printf("unsigned char max = %u\n", (unsigned char)~0);
printf("unsigned short max = %u\n", (unsigned short)~0);
printf("unsigned int max = %u\n", (unsigned int)~0);
printf("unsigned long max = %lu\n", (unsigned long)~0);
return 0;
}