c数据类型有哪些 C 数据类型

  #include <stdio.h> 
  #include <limits.h>    // integer limits 
  #include <float.h>     // floating-point limits 
  int main(void) 
  { 
      printf("Some number limits for this system:n"); 
      printf("Biggest int: %dn", INT_MAX); 
      printf("Smallest long long: %lldn", LLONG_MIN); 
      printf("One byte = %d bits on this system.n", CHAR_BIT); 
      printf("Largest double: %en", DBL_MAX); 
      printf("Smallest normal float: %en", FLT_MIN); 
      printf("float precision = %d digitsn", FLT_DIG); 
      printf("float epsilon = %en", FLT_EPSILON); 
   
      return 0; 
  }    

#include <stdio.h>
int main(void)
{
    int feet, fathoms;
    
    fathoms = 2;
    feet = 6 * fathoms;
    printf("There are %d feet in %d fathoms!n", feet, fathoms);
    printf("Yes, I said %d feet!n", 6 * fathoms);
    
    return 0;
}

#include <stdio.h>
int main(void)
{
    int dogs;
    
    printf("How many dogs do you have?n");
    scanf("%d", &dogs);
    printf("So you have %d dog(s)!n", dogs);
    
    return 0;
}

#include <stdio.h>
#include <inttypes.h> // supports portable types
int main(void)
{
    int32_t me32;     // me32 a 32-bit signed variable
    
    me32 = 45933945;
    printf("First, assume int32_t is int: ");
    printf("me32 = %dn", me32);
    printf("Next, let"s not make any assumptions.n");
    printf("Instead, use a "macro" from inttypes.h: ");
    printf("me32 = %" PRId32 "n", me32);
    
    return 0;
}

#include <stdio.h>
int main(void)
{
    int x = 100;
    
    printf("dec = %d; octal = %o; hex = %xn", x, x, x);
    printf("dec = %d; octal = %#o; hex = %#xn", x, x, x);
    
    return 0;
}

#include <stdio.h>
int main(void)
{
    unsigned int un = 3000000000; 
    short end = 200;              
    long big = 65537;
    long long verybig = 12345678908642;
    
    printf("un = %u and not %dn", un, un);
    printf("end = %hd and %dn", end, end);
    printf("big = %ld and not %hdn", big, big);
    printf("verybig= %lld and not %ldn", verybig, verybig);
    
    return 0;
}

#include <stdio.h>
int main(void)
{
    float aboat = 32000.0;
    double abet = 2.14e9;
    long double dip = 5.32e-5;
    
    printf("%f can be written %en", aboat, aboat);
    // next line requires C99 or later compliance
    printf("And it"s %a in hexadecimal, powers of 2 notationn", aboat);
    printf("%f can be written %en", abet, abet);
    printf("%Lf can be written %Len", dip, dip);
    
    return 0;
}

#include <stdio.h>
int main(void)
{
    int i = 2147483647;
    unsigned int j = 4294967295;
    
    printf("%d %d %dn", i, i+1, i+2);
    printf("%u %u %un", j, j+1, j+2);
    
    return 0;
}

#include <stdio.h>
int main(void)
{
    
    printf("Type int has a size of %zd bytes.n", sizeof(int));
    printf("Type char has a size of %zd bytes.n", sizeof(char));
    printf("Type long has a size of %zd bytes.n", sizeof(long));
    printf("Type long long has a size of %zd bytes.n",
           sizeof(long long));
    printf("Type double has a size of %zd bytes.n",
           sizeof(double));
    printf("Type long double has a size of %zd bytes.n",
           sizeof(long double));
    return 0;
}

#include <stdio.h>
#include <stdint.h>
#include <wchar.h>
#include <limits.h>
#include <float.h> 
#include <math.h>
int main(void)
{
    printf("PTRDIFF_MIN    = %tdn", PTRDIFF_MIN);
    printf("PTRDIFF_MAX    = %+tdn", PTRDIFF_MAX);
    printf("SIZE_MAX       = %zun", SIZE_MAX);
    printf("SIG_ATOMIC_MIN = %+jdn",(intmax_t)SIG_ATOMIC_MIN);
    printf("SIG_ATOMIC_MAX = %+jdn",(intmax_t)SIG_ATOMIC_MAX);
    printf("WCHAR_MIN      = %+jdn",(intmax_t)WCHAR_MIN);
    printf("WCHAR_MAX      = %+jdn",(intmax_t)WCHAR_MAX);
    printf("WINT_MIN       = %jdn", (intmax_t)WINT_MIN);
    printf("WINT_MAX       = %jdn", (intmax_t)WINT_MAX);

 
    printf("CHAR_BIT   = %dn", CHAR_BIT);
    printf("MB_LEN_MAX = %dn", MB_LEN_MAX);
    printf("n");
 
    printf("CHAR_MIN   = %+dn", CHAR_MIN);
    printf("CHAR_MAX   = %+dn", CHAR_MAX);
    printf("SCHAR_MIN  = %+dn", SCHAR_MIN);
    printf("SCHAR_MAX  = %+dn", SCHAR_MAX);
    printf("UCHAR_MAX  = %un",  UCHAR_MAX);
    printf("n");
 
    printf("SHRT_MIN   = %+dn", SHRT_MIN);
    printf("SHRT_MAX   = %+dn", SHRT_MAX);
    printf("USHRT_MAX  = %un",  USHRT_MAX);
    printf("n");
 
    printf("INT_MIN    = %+dn", INT_MIN);
    printf("INT_MAX    = %+dn", INT_MAX);
    printf("UINT_MAX   = %un",  UINT_MAX);
    printf("n");
 
    printf("LONG_MIN   = %+ldn", LONG_MIN);
    printf("LONG_MAX   = %+ldn", LONG_MAX);
    printf("ULONG_MAX  = %lun",  ULONG_MAX);
    printf("n");
 
    printf("LLONG_MIN  = %+lldn", LLONG_MIN);
    printf("LLONG_MAX  = %+lldn", LLONG_MAX);
    printf("ULLONG_MAX = %llun",  ULLONG_MAX);
    printf("n");
    printf("FLT_RADIX    = %dn", FLT_RADIX);
    printf("DECIMAL_DIG  = %dn", DECIMAL_DIG);
    printf("FLT_MIN      = %en", FLT_MIN);
    printf("FLT_MAX      = %en", FLT_MAX);
    printf("FLT_EPSILON  = %en", FLT_EPSILON);
    printf("FLT_DIG      = %dn", FLT_DIG);
    printf("FLT_MANT_DIG = %dn", FLT_MANT_DIG);
    printf("FLT_MIN_EXP  = %dn",  FLT_MIN_EXP);
    printf("FLT_MIN_10_EXP  = %dn",  FLT_MIN_10_EXP);
    printf("FLT_MAX_EXP     = %dn",  FLT_MAX_EXP);
    printf("FLT_MAX_10_EXP  = %dn",  FLT_MAX_10_EXP);
    printf("FLT_ROUNDS      = %dn",  FLT_ROUNDS);
    printf("FLT_EVAL_METHOD = %dn",  FLT_EVAL_METHOD);
}