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#include <iostream>
#include <math.h>
using namespace std;
 
int main()
{
	float x, y, a=-2, b=2, h=0.2;
	//cout<<"Enter left and right limits (a and b) of the interval and step value (h) separated by space:\n";
	//cin>>a>>b>>h; 
	cout.precision(3);
	cout<<"\n    X    |    Y\n_________|_________\n";
	for (x=a; x<=b; x+=h)
	{
		if (x>0) 
		{
			cout.width(8);
			cout<<x<<" | ";
			cout.width(8);
			cout<<pow(log(abs(x)), 2)/x<<"\n";
		}
		if (x<0) 
		{
			cout.width(8);
			cout<<x<<" | ";
			cout.width(8);
			cout<<1/(pow(x, 2)*sin(2*x))<<"\n";
		}
		if (x==0) 
		{
			y=0;
			cout.width(8);
			cout<<x<<" | ";
			cout.width(8);
			cout<<y<<"\n";
		}
	}
	system("pause");
}

prog.cpp: In function ‘int main()’:
prog.cpp:20:23: error: call of overloaded ‘abs(float&)’ is ambiguous
    cout<<pow(log(abs(x)), 2)/x<<"\n";
                       ^
prog.cpp:20:23: note: candidates are:
In file included from /usr/include/c++/4.8/cstdlib:72:0,
                 from /usr/include/c++/4.8/ext/string_conversions.h:41,
                 from /usr/include/c++/4.8/bits/basic_string.h:2815,
                 from /usr/include/c++/4.8/string:52,
                 from /usr/include/c++/4.8/bits/locale_classes.h:40,
                 from /usr/include/c++/4.8/bits/ios_base.h:41,
                 from /usr/include/c++/4.8/ios:42,
                 from /usr/include/c++/4.8/ostream:38,
                 from /usr/include/c++/4.8/iostream:39,
                 from prog.cpp:2:
/usr/include/stdlib.h:770:12: note: int abs(int)
 extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur;
            ^
In file included from /usr/include/c++/4.8/ext/string_conversions.h:41:0,
                 from /usr/include/c++/4.8/bits/basic_string.h:2815,
                 from /usr/include/c++/4.8/string:52,
                 from /usr/include/c++/4.8/bits/locale_classes.h:40,
                 from /usr/include/c++/4.8/bits/ios_base.h:41,
                 from /usr/include/c++/4.8/ios:42,
                 from /usr/include/c++/4.8/ostream:38,
                 from /usr/include/c++/4.8/iostream:39,
                 from prog.cpp:2:
/usr/include/c++/4.8/cstdlib:174:3: note: long long int std::abs(long long int)
   abs(long long __x) { return __builtin_llabs (__x); }
   ^
/usr/include/c++/4.8/cstdlib:166:3: note: long int std::abs(long int)
   abs(long __i) { return __builtin_labs(__i); }
   ^

Standard output is empty