3K
The floor and ceiling functions map a real number to the greatest preceding or the least succeeding integer, respectively.
floor(x) : Returns the largest integer that is smaller than or equal to x (i.e : rounds downs the nearest integer).
// Here x is the floating point value. // Returns the largest integer smaller // than or equal to x double floor(double x)
Examples of Floor:
Input : 3.5 Output : 3 Input : -3.1 Output : -4 Input : 1.9 Output : 1
// C++ program to demonstrate floor function
#include <iostream>
#include <cmath>
using namespace std;
// Driver function
int main()
{
// using floor function which return
// floor of input value
cout << "Floor is : " << floor(3.3) << endl;
cout << "Floor is : " << floor(-3.3) << endl;
return 0;
}
Output:
Floor is : 3 Floor is : -4
ceil(x) : Returns the smallest integer that is greater than or equal to x (i.e : rounds up the nearest integer).
// Here x is the floating point value. // Returns the smallest integer greater // than or equal to x double ceiling(double x)
Examples of Ceil:
Input : 29.5 Output : 30 Input : -23.1 Output : -24 Input : 21.9 Output : 22
// C++ program to demonstrate ceil function
#include <iostream>
#include <cmath>
using namespace std;
int main()
{
// using ceil function which return
// floor of input value
cout << " Ceil is : " << ceil(3.3) << endl;
cout << " Ceil is : " << ceil(-6.3) << endl;
return 0;
}
Output:
Ceil is : 4 Ceil is : -7
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