The compiler was giving me loads of weird errors like I'd never seen before. Essentially I had an object which held an array for a matrix math library. I was trying to build math operations on the matrices which would make it easier for the user of the matrix class. The code's on campus but it was silly errors. Essentially I am now saying matrixObject* += matrixObject2*. It's saved on campus anyway.PistolGrip said:
I'm guessing you're not referring to actual exceptions because that's a specific way of handling unexpected program flow.PistolGrip said:
gdb supports remote debugging. http://davis.lbl.gov/Manuals/GDB/gdb_17.html
dlopen() gives you a handle with which you can access symbols. A good example is here: http://www.opengroup.org/onlinepubs/009695399/functions/dlsym.html
gdb wrappers for IDEs are usually pretty good. I am hooked on Xcode right now, which ships with such a wrapper, and it's pretty cool.* what preferred tools do you use to debug, code in a unix environment. Currently I am using netbeans (with jVi plugin) along with its debugger which is fantastic and free. intelliJ for Java is untouchable though
That's really just debugging and looking at the stack. Check your debugger documentation. In gdb, the stack print command is bt.
Why do you want to work here specifically?
If this is an exception that you throw (or control), you can do it in the exception class c-tor.PistolGrip said:
Visual Studio supports it, though I'm not sure if the free Express versions does.PistolGrip said:
Pretty much.PistolGrip said:
wmat said:
Visualante said:
//definition
MatrixWrapper & operator+=(const MatrixWrapper &rhs){
...
}
//call
MatrixWrapper mObj , mObj2;
mObj += mObj2
// or with pointers but make sure pointers point to something!
MatrixWrapper mObj , mObj2;
MatrixWrapper * mObj2Ptr = & mObj2;
MatrixWrapper * mObjPtr = & mObj1;
//dereference the pointers because the operator belongs to the object not the pointer.
(* mObjPtr) += (* mObj2Ptr);
// Design and run a program that takes a numerical score and outputs a letter grade.
// Specific numerical scores and letter grades are listed below:
// 90-100 = Grade A
// 80-89 = Grade B
// 70-79 = Grade C
// 60-69 = Grade D
// 0-59 = Grade F
// In this program, create two void functions titled getScore and printGrade with an int argument.
// The function getScore should have a Reference parameter and printGrade should have a Value parameter.
// The function getScore will prompt the user for the numerical score, get the input from the user, and print the numerical score.
// The function printGrade will calculate the course grade and print the course grade.
// (Be careful and note that the assignment requires you to input the grade into getScore and not directly into the main function.)
// Do not forget to put in the proper prompts and appropriate output messages.
// (Note: This program is a natural for use of the switch command, but if?else structures will also work.)
#include <iostream>
using namespace std;
void getScore();
void printGrades();
int score;
int &grade = score;
void getScore (int&)
{
cout << "Enter what score you got out of a hundred on the test?\n";
cout << "And I will tell you the letter grade: ";
cin >> score;
}
void printGrades(int)
{
if (grade >= 0 , grade <= 59)
{
cout << "You got a " << score << " that is an F.";
}
else if (grade >= 60 , grade <= 69)
{
cout << "You got a " << score << " that is a D.";
}
else if (grade >= 70 , grade <= 79)
{
cout << "You got a " << score << " that is a C.";
}
else if (grade >= 80 , grade <= 89)
{
cout << "You got an " << score << " that is a B.";
}
else if (grade >= 90 , grade <= 100)
{
cout << "You got a " << score << " that is an A.";
}
}
int main()
{
getScore(score);
printGrades(grade);
return 0;
}You can do thisDucarmel said:
switch (grade % 10)
case 9:
//90-100
break;
case 8:
//80-90
break;
...CrayzeeCarl said:
Crap, yeah, that's what I meant. :loljosephdebono said:Um, no you need to do div not % since % is modulus.
Ducarmel said:
lettergrademap = array[11]
lettergrademap[0] = F
lettergrademap[1] = F
lettergrademap[2] = F
lettergrademap[3] = F
lettergrademap[4] = F
lettergrademap[5] = F
lettergrademap[6] = D
lettergrademap[7] = C
lettergrademap[8] = B
lettergrademap[9] = A
lettergrademap[10] = A
function letterforscore(score):
return lettergrademap[score/10]rpmurphy said:
New is pretty much the same as malloc, but it gives you typesafety, automatic calculation of the amount of memory to allocate, it can be overriden by the class to provide additional specialized functionality, and it calls the class's constructor.BlueMagic said:
nooooooSlavik81 said:
ohhhSlavik81 said:
Wrong! Use stl containers and put that crap on the stack!Slavik81 said:
You can't do it with C or C++ language constructs, but some heap implementations support it.rpmurphy said:
There is really very little reason to use malloc.Slavik81But said:
//Define a class called Plot that has private members of length and width.
//Include a constructor and a public function that calculates the area
// and the length of the boundary of the field.
//Use public functions in a program that computes and displays the area
// and the length of the boundary of the plot where the length and width are 7 and 9 respectively.
//Hint: The length of the boundary is 2 * (length + width).
#include <iostream>
using namespace std;
class Plot
{
public:
int l,w;
Plot (int, int);
int area(){return 2 * ( l + w );};
int perimeter(){return (l * w);};
private:
int length;
int width;
};
Plot::Plot (int length, int width)
{
length = l;
width = w;
}
int main()
{
Plot rec(7,9);
cout << "The area of 7 and 9 is: " << rec.area() << endl;
cout << "The Perimeter of 7 and 9 is: " << rec.perimeter() << endl;
return 0;
}class Plot
{
public:
Plot (int, int);
int perimeter(){return 2 * ( l + w );};
int area(){return (l * w);};
private:
int l;
int w;
};
Plot::Plot (int length, int width)
{
this.l = length;
this.w = width;
}const int LENGTH = 7;
const int WIDTH = 9;
main()
{
Plot rec(LENGTH, WIDTH);
cout << "The area of " << LENGTH << " and " << WIDTH << " is " rec.area() << endl;
}AcciDante said:
AcciDante said:
I think you're going a bit overboard with this.josephdebono said:
Ignoring templates (and ignoring some other stuff, so don't be anal):AcciDante said: