What will the following program display? #include using namespace std; int main() { int unus, duo, tres; unus = duo = tres = 5; unus += 4; duo *= 2; tres −= 4; unus /= 3; duo += tres; cout << unus << endl; cout << duo << endl; cout << tres << endl; return 0; }

C++ complete magic Square #include <iostream> using namespace std; /*int f( int x, int y, int* p, int* q ){if ( y == 0 ){p = 0, q = 0;return 404; // status: Error 404}*p = x * y; // product*q = x / y; // quotient return 200; // status: OK 200} int main(){int p, q;int status = f(10, 2, &p, &q);if ( status == 404 ){cout << "[ERR] / by zero!" << endl;return 0;}cout << p << endl;cout << q << endl; return 0;}*/ /*struct F_Return{int p;int q;int status;}; F_Return f( int x, int y ){F_Return r;if ( y == 0 ){r.p = 0, r.q = 0;r.status = 404;return r;}r.p = x * y;r.q = x / y;r.status = 200;return r;} int main(){F_Return r = f(10, 0);if ( r.status == 404 ){cout << "[ERR] / by zero" << endl;return 0;}cout << r.p << endl;cout << r.q << endl;return 0;}*/ int sumByRow(int *m, int nrow, int ncol, int row){ int total = 0;for ( int j = 0; j < ncol; j++ ){total += m[row * ncol + j]; //m[row][j];}return total; } /*…

C++ Help me fix my code please! I'm missing something and can't figure it out. Code and error picture are below. #include <iostream> using namespace std; class Employee{    public:    string first_name;    string last_name;    int monthly_sal;    int increment;    Employee()    {        first_name="";        last_name="";        monthly_sal=0;        increment=0;    }    void setFirst_Name(string first_name)    {        this->first_name=first_name;    }    void setLast_Name(string last_name)    {        this->last_name=last_name;    }    void setSal(int monthly_sal)    {        if(monthly_sal<0)        this->monthly_sal=0;        this->monthly_sal=monthly_sal;    }    void setInc(int increment)    {        monthly_sal += increment;    }    string getFirst_Name()    {     return first_name;       }    string getLast_Name()    {        return last_name;    }    int get_salary()    {        return monthly_sal;    }    int get_increment()    {        return increment;…

C++ Find the errors in the code for Date Class and Source.cpp program and fix them. source.cpp include <iostream>#include "Date.h" // include definition of class Date from Date.h using namespace std; // function main begins program executionint main(){Date date(); // create a Date object for May 6, 1981 // display the values of the three Date data members cout << "Month: " << date.getMonth() << endl;cout « "Day: " << date.getDay() << endl;cout << "Year: " << date.getYear(2017) << endl; cout << "\nOriginal date:" << endl;date = displayDate(); // output the Date// modify the Date setMonth(13);setDay(1);setYear(2005); cout "\nNew date:" << endl;date.displayDate(); // output the modified date } // end main Date.h // class Data definition#include <iostream>using namespace std; //Data constructor that initializes the three data members;class Date{publicdate(m, d, y){setMonth();setDay();setYear();};// set monthvoid…