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#include <cstdlib> 
#include <iostream> 
#include <cmath> 
 
using namespace std; 
 
int main(int argc, char *argv[])
{
    double x, y; 
    cin >> x >> y; 
    a = log(y^sqrt(-fabs(x))(sin(x)+ 2.7183^(x+y))); 
    cout << "a = " << a << endl; 
    system("PAUSE"); 
    return EXIT_SUCCESS; 
 
}
 

prog.cpp: In function ‘int main(int, char**)’:
prog.cpp:11:5: error: ‘a’ was not declared in this scope
     a = log(y^sqrt(-fabs(x))(sin(x)+ 2.7183^(x+y)));
     ^
prog.cpp:11:44: error: invalid operands of types ‘double’ and ‘double’ to binary ‘operator^’
     a = log(y^sqrt(-fabs(x))(sin(x)+ 2.7183^(x+y)));
                              ~~~~~~~~~~~~~~^~~~~~
prog.cpp:11:50: error: expression cannot be used as a function
     a = log(y^sqrt(-fabs(x))(sin(x)+ 2.7183^(x+y)));
                                                  ^

Standard output is empty