Examples of lrint()
Example 1
The below CPP code illustrates the functionality of lrint() and setting rounding direction to DOWNWARD.
C++
// CPP code to illustrate// the functionality of lrint()#include <cfenv>#include <cmath>#include <iostream>using namespace std;int main(){ int a = 15; long int answer; // setting rounding direction to DOWNWARD fesetround(FE_DOWNWARD); answer = lrint(a); cout << "Downward rounding of " << a << " is " << answer << endl; return 0;} |
Output
Downward rounding of 15 is 15
Example 2
The CPP code illustrates the functionality of lrint() and values are rounded to the nearest integer using the default rounding mode.
C++
// CPP code to illustrate// the functionality of lrint()#include <cfenv>#include <cmath>#include <iostream>using namespace std;int main(){ double a; long int answer; // By default, the rounding direction // is set to 'to-nearest'. // fesetround(FE_TONEAREST) a = 50.35; answer = lrint(a); cout << "Nearest rounding of " << a << " is " << answer << endl; // mid values are rounded off to higher integer a = 50.5; answer = lrint(a); cout << "Nearest rounding of " << a << " is " << answer << endl; return 0;} |
Output
Nearest rounding of 50.35 is 50 Nearest rounding of 50.5 is 50
Example 3
The below CPP code illustrates the functionality of lrint() and the rounding direction is set to UPWARD.
C++
// CPP code to illustrate// the functionality of lrint()#include <cfenv>#include <cmath>#include <iostream>using namespace std;int main(){ double a; long int answer; // Now, the rounding direction // is set to UPWARD fesetround(FE_UPWARD); a = 50.3; answer = lrint(a); cout << "Upward rounding of " << a << " is " << answer << endl; // Now, the rounding direction // is set to DOWNWARD fesetround(FE_DOWNWARD); a = 50.88; answer = lrint(a); cout << "Downward rounding of " << a << " is " << answer << endl; return 0;} |
Output
Upward rounding of 50.3 is 51 Downward rounding of 50.88 is 50