llround(x)函数详解

long long int llround(data_type x);

#include <iostream>  
#include<math.h>  
using namespace std;  
int main()  
{  
    float x=50.8;  
    std::cout <<"The value of x is :" <<x<< std::endl;  
    std::cout << "The rounded value of x is :"<<llround(x) << std::endl;  
    return 0;  
}