C++/Data Type/sizeof
Determining the Size of Variable Types
#include <iostream>
int main()
{
using std::cout;
cout << "The size of an int is:\t\t" << sizeof(int) << " bytes.\n";
cout << "The size of a short int is:\t" << sizeof(short) << " bytes.\n";
cout << "The size of a long int is:\t" << sizeof(long) << " bytes.\n";
cout << "The size of a char is:\t\t" << sizeof(char) << " bytes.\n";
cout << "The size of a float is:\t\t" << sizeof(float) << " bytes.\n";
cout << "The size of a double is:\t" << sizeof(double) << " bytes.\n";
cout << "The size of a bool is:\t" << sizeof(bool) << " bytes.\n";
return 0;
}
Get array length with sizeof function
#include <algorithm>
#include <iostream>
#include <iterator>
#include <vector>
using namespace std;
int main(){
const int a[] = { 98, 7, 54, 69, 87, 88, 56, 92, 77,39, };
const int len = sizeof( a ) / sizeof( a[0] );
}