The nearbyint() function is defined in cmath header file. This function round off the given value to a nearby integral value by using the current rounding method. The current rounding method is described by fegetround.
Syntax:
float nearbyint(float x); or, double nearbyint(double x); or, long double nearbyint(long double x);
Parameters: This function accepts single parameter x which contains floating point value.
Return Value: It returns the rounded value of x to a nearby integral value by using the rounding method.
Below programs illustrate the nearbyint() function in C++:
Program 1:
// C++ program to demonstrate // example of nearbyint() function. #include <bits/stdc++.h> using namespace std; int main() { float x = 2.7; cout << "Value of x = " << x << endl; cout << "Round off value of x = " << nearbyint(x); return 0; } |
Output:
Value of x = 2.7 Round off value of x = 3
Program 2:
// C++ program to demonstrate // example of nearbyint() function. #include <bits/stdc++.h> using namespace std; int main() { double x = 3.2; cout << "Value of x = " << x << endl; cout << "Round off value of x = " << nearbyint(x); return 0; } |
Output:
Value of x = 3.2 Round off value of x = 3
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