round(x)函数详解

round(5.8)= 6;
round(-1.1)= -1;

return_type round(data_type x);

#include <iostream>  
#include<math.h>  
using namespace std;  
int main()  
{  
    float x=8.3;  
    std::cout << "The value of x is : " <<x<< std::endl;  
    cout<<"Rounded value of x is : "<<round(x);  
    return 0;  
}  

#include <iostream>  
#include<math.h>  
using namespace std;  
int main()  
{  
    double x=-9.9;  
    std::cout << "The value of x is : " <<x<< std::endl;  
    cout<<"Rounded value of x is : "<<round(x);  
    return 0;  
}