c 数据类型范围 C 数据类型限制

    #include <stdio.h>                          // For command line input and output 
    #include <limits.h>                         // For limits on integer types 
    #include <float.h>                          // For limits on floating-point types 

    int main(void) 
    { 
      printf("Variables of type char store values from %d to %dn", CHAR_MIN, CHAR_MAX); 
      printf("Variables of type unsigned char store values from 0 to %un", UCHAR_MAX); 
      printf("Variables of type short store values from %d to %dn", SHRT_MIN, SHRT_MAX); 
      printf("Variables of type unsigned short store values from 0 to %un", USHRT_MAX); 
      printf("Variables of type int store values from %d to %dn", INT_MIN,  INT_MAX); 
      printf("Variables of type unsigned int store values from 0 to %un", UINT_MAX); 
      printf("Variables of type long store values from %ld to %ldn", LONG_MIN, LONG_MAX); 
      printf("Variables of type unsigned long store values from 0 to %lun", ULONG_MAX); 
      printf("Variables of type long long store values from %lld to %lldn", LLONG_MIN, LLONG_MAX); 
      printf("Variables of type unsigned long long store values from 0 to %llun", ULLONG_MAX); 
      printf("nThe size of the smallest positive non-zero value of type float is %.3en", FLT_MIN); 
      printf("The size of the largest value of type float is %.3en", FLT_MAX); 
      printf("The size of the smallest non-zero value of type double is %.3en", DBL_MIN); 
      printf("The size of the largest value of type double is %.3en", DBL_MAX); 
      printf("The size of the smallest non-zero value of type long double is %.3Len", LDBL_MIN); 
      printf("The size of the largest value of type long double is %.3Len",  LDBL_MAX); 
      printf("n Variables of type float provide %u decimal digits precision. n", FLT_DIG); 
      printf("Variables of type double provide %u decimal digits precision. n", DBL_DIG); 
      printf("Variables of type long double provide %u decimal digits precision. n", 
                                                                            LDBL_DIG); 
      return 0; 
    } 

    #include <stdio.h> 

    int main(void) 
    { 
      printf("Variables of type char occupy %u bytesn", sizeof(char)); 
      printf("Variables of type short occupy %u bytesn", sizeof(short)); 
      printf("Variables of type int occupy %u bytesn", sizeof(int)); 
      printf("Variables of type long occupy %u bytesn", sizeof(long)); 
      printf("Variables of type long long occupy %u bytesn", sizeof(long long)); 
      printf("Variables of type float occupy %u bytesn", sizeof(float)); 
      printf("Variables of type double occupy %u bytesn", sizeof(double)); 
      printf("Variables of type long double occupy %u bytesn", sizeof(long double)); 
      return 0; 
    }