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#include <iostream>
#include <cmath>
 
#define INT_FIVE int i = 5;
#define DOUBLE_FIVE double d = 5;
 
int main() {
 
   cout << "The normal square root of 5 is: " << sqrt(DOUBLE_FIVE) << endl;
   cout << "The int square root of 5 is: " << (int)sqrt(INT_FIVE) << endl;
   return 0;
}

prog.cpp: In function ‘int main()’:
prog.cpp:9:4: error: ‘cout’ was not declared in this scope
    cout << "The normal square root of 5 is: " << sqrt(DOUBLE_FIVE) << endl;
    ^
prog.cpp:9:4: note: suggested alternative:
In file included from prog.cpp:1:0:
/usr/include/c++/4.8/iostream:61:18: note:   ‘std::cout’
   extern ostream cout;  /// Linked to standard output
                  ^
prog.cpp:5:21: error: expected primary-expression before ‘double’
 #define DOUBLE_FIVE double d = 5;
                     ^
prog.cpp:9:55: note: in expansion of macro ‘DOUBLE_FIVE’
    cout << "The normal square root of 5 is: " << sqrt(DOUBLE_FIVE) << endl;
                                                       ^
prog.cpp:9:66: error: expected primary-expression before ‘)’ token
    cout << "The normal square root of 5 is: " << sqrt(DOUBLE_FIVE) << endl;
                                                                  ^
prog.cpp:9:66: error: expected ‘;’ before ‘)’ token
prog.cpp:4:18: error: expected primary-expression before ‘int’
 #define INT_FIVE int i = 5;
                  ^
prog.cpp:10:57: note: in expansion of macro ‘INT_FIVE’
    cout << "The int square root of 5 is: " << (int)sqrt(INT_FIVE) << endl;
                                                         ^
prog.cpp:10:65: error: expected primary-expression before ‘)’ token
    cout << "The int square root of 5 is: " << (int)sqrt(INT_FIVE) << endl;
                                                                 ^
prog.cpp:10:65: error: expected ‘;’ before ‘)’ token

Standard output is empty