| DATA TYPE | SIZE (IN BYTES) | RANGE |
|---|
| short int | 2 | -32,768 to 32,767 |
| unsigned short int | 2 | 0 to 65,535 |
| unsigned int | 4 | 0 to 4,294,967,295 |
| int | 4 | -2,147,483,648 to 2,147,483,647 |
| long int | 4 | -2,147,483,648 to 2,147,483,647 |
| unsigned long int | 4 | 0 to 4,294,967,295 |
| long long int | 8 | -(2^63) to (2^63)-1 |
| unsigned long long int | 8 | 0 to 18,446,744,073,709,551,615 |
| signed char | 1 | -128 to 127 |
| unsigned char | 1 | 0 to 255 |
| float | 4 | -3.4*10(-38)～3.4*10(38) 有效位数(6-7) |
| double | 8 | -1.7*10(-308)～1.7*10(308)有效位数(15-16) |
| long double | 12 | -1.2*10(-4932)～1.2*10(4932) |
| wchar_t | 2 or 4 | 1 wide character |
sizeof operator
Queries size of the object or type.
Used when actual size of the object must be known.
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21 | /******************************************************************************
data type
*******************************************************************************/
#include<iostream>
using namespace std;
int main()
{
cout << "Size of char : " << sizeof(char)<< " byte" << endl;
cout << "Size of int : " << sizeof(int) << " bytes" << endl;
cout << "Size of float : " << sizeof(float)<< " bytes" <<endl;
cout << "Size of double : " << sizeof(double)<< " bytes" << endl;
int a=2147483645;
cout<<a<<endl;
cout<<a+2<<endl;
cout<<a+4<<endl;
return 0;
}
|
