C++/Data Type/Int
Версия от 14:21, 25 мая 2010; (обсуждение)
Содержание
- 1 addition operator in cout
- 2 Computes the lowest common denominator.
- 3 convert string (char) to int
- 4 cout: output INT_MIN, INT_MAX and UINT
- 5 Define, input and output int value
- 6 Divided by int
- 7 Inputting int Values for Multiple Variables
- 8 Integer pointer
- 9 Int value operations
- 10 Using atoi: convert string to int
- 11 Using cin Object to Read Integer Values from Keyboard
addition operator in cout
#include <iostream>
using namespace std;
int main(void)
{
int total, added, dropped;
cout << "Enter total: ";
cin >> total;
cout << "Enter added: ";
cin >> added;
total = total + added;
cout << "Enter dropped ";
cin >> dropped;
total -= dropped;
cout << "Number: " << total << endl;
return 0;
}
Computes the lowest common denominator.
#include <iostream>
using namespace std;
int main()
{
int a, b, d, min;
cout << "Enter two numbers: ";
cin >> a >> b;
min = a > b ? b : a;
for(d = 2; d<min; d++)
if(((a%d)==0) && ((b%d)==0))
break;
if(d==min) {
cout << "No common denominators\n";
return 0;
}
cout << "The lowest common denominator is " << d << ".\n";
return 0;
}
convert string (char) to int
#include <iostream>
#include <stdlib.h>
using namespace std;
int main(int argc, char **argv)
{
char letter;
int count = 0;
int line_limit;
line_limit = atoi(argv[1]);
while ((letter = cin.get()) != -1){
cout.put(letter);
if ((letter == "\n") && (++count == line_limit))
break;
}
}
cout: output INT_MIN, INT_MAX and UINT
#include <iostream>
#include <climits> // Definition of INT_MIN, ...
using namespace std;
int main()
{
cout << "Range of types int and unsigned int" << endl;
cout << "Type Minimum Maximum" << endl;
cout << "int" << INT_MIN << " " << INT_MAX << endl;
cout << "unsigned int" << " 0 " << UINT_MAX << endl;
return 0;
}
Define, input and output int value
#include <iostream>
using namespace std;
int main()
{
int b, e, r;
cout << "Enter base: ";
cin >> b;
cout << "Enter exponent: ";
cin >> e;
r = 1;
for( ; e; e--)
r = r * b;
cout << "Result: " << r;
return 0;
}
Divided by int
#include <iostream>
using namespace std;
int main(void)
{
int firstOp = 10, secondOp = 4;
float result = firstOp / secondOp;
cout << firstOp << " / " << secondOp << " = " << result;
return 0;
}
Inputting int Values for Multiple Variables
#include <iostream>
using namespace std;
int main(void)
{
int myWeight, myHeight;
string myName;
cout << "Enter your name: ";
cin >> myName;
cout << "Enter your weight in pounds: ";
cin >> myWeight;
cout << "Enter your height in inches: ";
cin >> myHeight;
cout << "Your name score is " << myName << "\n";
cout << "Your weight in pounds is " << myWeight << "\n";
cout << "Your height in inches is " << myHeight << "\n";
return 0;
}
Integer pointer
#include <iostream>
using std::cout;
using std::endl;
int main()
{
int x = 5;
// "p" points to "x"
int* p = &x;
cout << "x = " << x << endl;
// change the value of "x" through "p"
*p = 6;
cout << "x = " << x << endl;
return 0;
}
Int value operations
#include <iostream>
#include <string>
using namespace std;
int main(void)
{
int total, added, dropped, tuition;
cout << "Enter total: ";
cin >> total;
cout << "Enter add: ";
cin >> added;
total = total + added;
cout << "Enter dropped? ";
cin >> dropped;
total -= dropped;
cout << "Total number: " << total << endl;
tuition = (total + dropped) * 72;
cout << "Total tuition: $" << tuition << endl;
cout << "Average tuition: $"
<< (float) tuition / total;
return 0;
}
Using atoi: convert string to int
#include <iostream>
#include <stdlib.h>
using namespace std;
int main()
{
int i = atoi( "2593" );
cout << "The string \"2593\" converted to int is " << i
<< "\nThe converted value minus 593 is " << i - 593
<< endl;
return 0;
}
Using cin Object to Read Integer Values from Keyboard
#include <iostream>
using namespace std;
int main(){
int a = 0, b = 0, c = 0;
cout << "Enter values for a, b, and c: ";
cin >> a >> b >> c;
cout << a << " " << b << " " << c << endl;
return 0;
}