型や変数の大きさを表示

明解Ｃ言語 入門編 > 7. 基本型 >

型や変数の大きさを表示

C

#include <stdio.h>
int main(int argc, char* argv[])

{

    char                a;

    signed char         b;

    unsigned char       c;
    int                 d;

    signed int          e;

    unsigned            f;

    unsigned int        g;
    short               h;

    short int           i;

    signed short int    j;

    unsigned short      k;

    unsigned short int  l;
    long                m;

    long int            n;

    signed long int     o;

    unsigned long       p;

    unsigned long int   q;
    float               r;

    double              s;

    long double         t;
    bool                w;

    wchar_t             x;
    printf("sizeof(char)                 = %u\n", sizeof(a));

    printf("sizeof(signed char)          = %u\n", sizeof(b));

    printf("sizeof(unsigned char)        = %u\n", sizeof(c));
    printf("sizeof(int)                  = %u\n", sizeof(d));

    printf("sizeof(signed int)           = %u\n", sizeof(e));

    printf("sizeof(unsigned)             = %u\n", sizeof(f));

    printf("sizeof(unsigned int)         = %u\n", sizeof(g));
    printf("sizeof(short)                = %u\n", sizeof(h));

    printf("sizeof(short int)            = %u\n", sizeof(i));

    printf("sizeof(signed short int)     = %u\n", sizeof(j));

    printf("sizeof(unsigned short)       = %u\n", sizeof(k));

    printf("sizeof(unsigned short int)   = %u\n", sizeof(l));
    printf("sizeof(long)                 = %u\n", sizeof(m));

    printf("sizeof(long int)             = %u\n", sizeof(n));

    printf("sizeof(signed long int)      = %u\n", sizeof(o));

    printf("sizeof(unsigned long)        = %u\n", sizeof(p));

    printf("sizeof(unsigned long int)    = %u\n", sizeof(q));
    printf("sizeof(float)                = %u\n", sizeof(r));

    printf("sizeof(double)               = %u\n", sizeof(s));

    printf("sizeof(long double)          = %u\n", sizeof(t));
    printf("sizeof(bool)                 = %u\n", sizeof(w));

    printf("sizeof(wchar_t)              = %u\n", sizeof(x));
    return 0;

}

実行結果

R:\>lesson058\project1.exe

sizeof(char)                 = 1

sizeof(signed char)          = 1

sizeof(unsigned char)        = 1

sizeof(int)                  = 4

sizeof(signed int)           = 4

sizeof(unsigned)             = 4

sizeof(unsigned int)         = 4

sizeof(short)                = 2

sizeof(short int)            = 2

sizeof(signed short int)     = 2

sizeof(unsigned short)       = 2

sizeof(unsigned short int)   = 2

sizeof(long)                 = 4

sizeof(long int)             = 4

sizeof(signed long int)      = 4

sizeof(unsigned long)        = 4

sizeof(unsigned long int)    = 4

sizeof(float)                = 4

sizeof(double)               = 8

sizeof(long double)          = 10

sizeof(bool)                 = 1

sizeof(wchar_t)              = 2

Delphi

program Project1;
{$APPTYPE CONSOLE}
uses

    SysUtils;
procedure main();

var

    a: Shortint;

    b: Smallint;

    c: Longint;

    d: Byte;

    e: Word;

    f: Integer;

    g: Cardinal;

    h: Boolean;

    i: ByteBool;

    j: WordBool;

    k: LongBool;

    l: AnsiChar;

    m: WideChar;

    n: Char;

    o: Single;

    p: Double;

    q: Extended;

    r: Real;

    s: Pointer;

    t: PChar;

    u: PAnsiChar;

    v: Comp;

    w: OleVariant;

    x: Currency;

begin

    writeln(format('SizeOf(ShortInt)   = %d', [SizeOf(a)]));

    writeln(format('SizeOf(SmallInt)   = %d', [SizeOf(b)]));

    writeln(format('SizeOf(LongInt)    = %d', [SizeOf(c)]));

    writeln(format('SizeOf(Byte)       = %d', [SizeOf(d)]));

    writeln(format('SizeOf(Word)       = %d', [SizeOf(e)]));

    writeln(format('SizeOf(Integer)    = %d', [SizeOf(f)]));

    writeln(format('SizeOf(Cardinal)   = %d', [SizeOf(g)]));

    writeln(format('SizeOf(Boolean)    = %d', [SizeOf(h)]));

    writeln(format('SizeOf(ByteBool)   = %d', [SizeOf(i)]));

    writeln(format('SizeOf(WordBool)   = %d', [SizeOf(j)]));

    writeln(format('SizeOf(LongBool)   = %d', [SizeOf(k)]));

    writeln(format('SizeOf(AnsiChar)   = %d', [SizeOf(l)]));

    writeln(format('SizeOf(WideChar)   = %d', [SizeOf(m)]));

    writeln(format('SizeOf(Char)       = %d', [SizeOf(n)]));

    writeln(format('SizeOf(Single)     = %d', [SizeOf(o)]));

    writeln(format('SizeOf(Double)     = %d', [SizeOf(p)]));

    writeln(format('SizeOf(Extended)   = %d', [SizeOf(q)]));

    writeln(format('SizeOf(Real)       = %d', [SizeOf(r)]));

    writeln(format('SizeOf(Pointer)    = %d', [SizeOf(s)]));

    writeln(format('SizeOf(PChar)      = %d', [SizeOf(t)]));

    writeln(format('SizeOf(PAnsiChar)  = %d', [SizeOf(u)]));

    writeln(format('SizeOf(Comp)       = %d', [SizeOf(v)]));

    writeln(format('SizeOf(OleVariant) = %d', [SizeOf(w)]));

    writeln(format('SizeOf(Currency)   = %d', [SizeOf(x)]));

end;
begin

    main;

end.

実行結果

S:\>lesson058\project1.exe

SizeOf(ShortInt)   = 1

SizeOf(SmallInt)   = 2

SizeOf(LongInt)    = 4

SizeOf(Byte)       = 1

SizeOf(Word)       = 2

SizeOf(Integer)    = 4

SizeOf(Cardinal)   = 4

SizeOf(Boolean)    = 1

SizeOf(ByteBool)   = 1

SizeOf(WordBool)   = 2

SizeOf(LongBool)   = 4

SizeOf(AnsiChar)   = 1

SizeOf(WideChar)   = 2

SizeOf(Char)       = 1

SizeOf(Single)     = 4

SizeOf(Double)     = 8

SizeOf(Extended)   = 10

SizeOf(Real)       = 8

SizeOf(Pointer)    = 4

SizeOf(PChar)      = 4

SizeOf(PAnsiChar)  = 4

SizeOf(Comp)       = 8

SizeOf(OleVariant) = 16

SizeOf(Currency)   = 8