C and C++ Data Types

Here is a table with predefined C and C++ Data Types Data type Size in Bytes Size in Bits Interval  char 1 8  from -128 to 127  unsigned char 1 8  from 0 to 255  signed char 1  8 from -128 to 127  enum 4 32    short 2  16  from -32768 to 32767  int 4 32  from -2147483648 to 2147483647  unsigned 4 32  from 0 to 4294967295  long 4  32  from -2147483648 to 2147483647  unsigned long 4 32  from 0 to 4294967295  float 4 32    double 8 64    long double 12 96    tip  * 4 32   The table show C / C++ data types for a UNIX / Linux 32 bit machine. On different platform the size of data types might differ. You can check your data type size for your platform with a C++ program like the following one: data_types.cc #include <iostream>   using namespace std;   int main(void) { int a; char b; unsigned char c; signed char d; short e; unsigned f; long g; unsigned long h; float i; double j; long double k;   int *l;   cout << "int - " << sizeof(a) << endl; cout << "char - " << sizeof(b) << endl; cout << "unsigned char - " << sizeof(c) << endl; cout << "signed char - " << sizeof(d) << endl; cout << "short - " << sizeof(e) << endl; cout << "unsigned - " << sizeof(f) << endl; cout << "long - " << sizeof(g) << endl; cout << "unsigned long - " << sizeof(h) << endl;   cout << "float - " << sizeof(i) << endl; cout << "double - " << sizeof(j) << endl; cout << "long double - " << sizeof(k) << endl;   cout << "type * - " << sizeof(l) << endl; }

 

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