fabs(x)函数详解

fabs(x) = |x|;

float fabs(float x);
double fabs(double x);
int fabs(int x);  

#include <iostream>  
#include<math.h>  
using namespace std;  
 int main()  
{  
float x=11.2;  
 std::cout << "Value of x is :" <<x<< std::endl;  
 cout<<"Absolute value of x is : "<<fabs(x);  
 return 0;  
}  

#include <iostream>  
#include<math.h>  
using namespace std;  
int main()  
{  
   float x=-9.4;  
   std::cout << "Value of x is :" <<x<< std::endl;  
   cout<<"Absolute value of x is : "<<fabs(x);  
    return 0;  
}