易百教程

以下符号表示整数类型的范围限制。

无符号整数类型的下限均为0。

对应于无符号整数类型的上限的符号是：UCHAR_MAX，USHRT_MAX，UINT_MAX，ULONG_MAX和ULLONG_MAX。

以下代码将演示编译器的限制：

#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 %d\n", CHAR_MIN, CHAR_MAX);
  printf("Variables of type unsigned char store values from 0 to %u\n", UCHAR_MAX);
  printf("Variables of type short store values from %d to %d\n", SHRT_MIN, SHRT_MAX);
  printf("Variables of type unsigned short store values from 0 to %u\n", USHRT_MAX);
  printf("Variables of type int store values from %d to %d\n", INT_MIN,  INT_MAX);
  printf("Variables of type unsigned int store values from 0 to %u\n", UINT_MAX);
  printf("Variables of type long store values from %ld to %ld\n", LONG_MIN, LONG_MAX);
  printf("Variables of type unsigned long store values from 0 to %lu\n", ULONG_MAX);
  printf("Variables of type long long store values from %lld to %lld\n", LLONG_MIN, LLONG_MAX);
  printf("Variables of type unsigned long long store values from 0 to %llu\n", ULLONG_MAX);

  printf("\nThe size of the smallest positive non-zero value of type float is %.3e\n", FLT_MIN);
  printf("The size of the largest value of type float is %.3e\n", FLT_MAX);
  printf("The size of the smallest non-zero value of type double is %.3e\n", DBL_MIN);
  printf("The size of the largest value of type double is %.3e\n", DBL_MAX);
  printf("The size of the smallest non-zero value of type long double is %.3Le\n", LDBL_MIN);
  printf("The size of the largest value of type long double is %.3Le\n",  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);
  int number = INT_MAX;

  printf("%d",number);
  return 0;
}