C++/Data Type/Long
Содержание
cout for long int
#include <iostream>
using namespace std;
int main()
{
int i = 10;
long l = 1000000;
double d = -0.0009;
cout << i << " " << l << " " << d;
cout << endl;
return 0;
}
Using atol: convert string to long
#include <iostream>
#include <stdlib.h>
using namespace std;
int main()
{
long l = atol( "1000000" );
cout << "The string \"1000000\" converted to long is " << l
<< "\nThe converted value divided by 2 is " << l / 2
<< endl;
return 0;
}
Using strtol: convert string to long
#include <iostream>
#include <stdlib.h>
using namespace std;
int main()
{
long x;
char *string = "-1234567abc", *remainderPtr;
x = strtol( string, &remainderPtr, 0 );
cout << "The original string is \"" << string
<< "\"\nThe converted value is " << x
<< "\nThe remainder of the original string is \""
<< remainderPtr
<< "\"\nThe converted value plus 567 is "
<< x + 567 << endl;
return 0;
}
Using strtoul: convert string to unsigned long
#include <iostream>
#include <stdlib.h>
using namespace std;
int main()
{
unsigned long x;
char *string = "1234567abc", *remainderPtr;
x = strtoul( string, &remainderPtr, 0 );
cout << "The original string is \"" << string
<< "\"\nThe converted value is " << x
<< "\nThe remainder of the original string is \""
<< remainderPtr
<< "\"\nThe converted value minus 567 is "
<< x - 567 << endl;
return 0;
}