C++ error i cant get rid of!!

boyracer87

im writting a small program and i keep getting this error:

error C2111: pointer addition requires integral operand.

anyone got any ideas as to the problem?

heres the whole program:



#include <iostream.h>
#include <conio.h>
#include <string>
#include <vector>

using namespace std;

main()
{
float qty, i, lastqty(0),proqty(0) ;
float width,lenght, panelw(0), panell(0),result(0), wholeframe(0), promeasure(0);
vector<float> list;
cout<<"Qty: ";
cin>>qty;
cout<<"Width: ";
cin>>width;
cout<<"Length: ";
cin>>lenght;

while (list.size() >= 0){
if(qty > 0){
result = width - 4.25;
panelw=result;
panell=lenght-4.25;
proqty=proqty+qty;
wholeframe=result+lenght;
promeasure=promeasure+wholeframe;

list.push_back(qty + " " + width + " X " + lenght + " " + result + " " + panelw + " X " + panell);


cout<<"Qty: ";
cin>>qty;
cout<<"Width: ";
cin>>width;
cout<<"Length: ";
cin>>lenght;

}
i=0;
while (i < list.size()){
cout<<list<<endl;
i++;
}

}

}

vectra

I have an idea..
Post it in the right forum and some people that know about coding etc. might be able to help out

Creamy Goodness

don't know much about c++ but i stuck this code into dev-C++ and it's showing that the error you are getting is located on this line

list.push_back(qty + " " + width + " X " + lenght + " " + result + " " + panelw + " X " + panell);

tallus

how is that relevant to the models board?
Yeah what vectra said

boyracer87

sorry guys. i was in the programming forum before and forgot that i changed to this one :rolleyes:

tallus

It happens heh

vectra

boyracer87 wrote:

sorry guys. i was in the programming forum before and forgot that i changed to this one :rolleyes:

No wonder you cant sort it... you cant even remember what forum you are on


Only messing m8.
Nothing personal and no offence meant.. Just having a laugh

Vuk

boyracer87 wrote:

im writting a small program and i keep getting this error:

error C2111: pointer addition requires integral operand.

list.push_back(qty + " " + width + " X " + lenght + " " + result + " " + panelw + " X " + panell);

As your program stands, all thats going into the vector is the addition of all your variables, ie qty is being added to width and in turn being added to length and so forth... and you end up with one result!
Whats happening with the error is that you're trying to use additon on non float values and also 'insert' them into a vector that holds floating point numbers. Some extra detail on what you're trying to achieve might help!
At a guess, are you trying to hold a record of inputs & results with seperators?

Mutant_Fruit

lenght <--- is that a typo?

Darwin

Briefly, you've several problems. Your vector is set up to store float's, but you're trying to store strings in it. There is no string concatenation operator (+) in C++ (such as there is in Java). To concatenate say a string and a float to produce a string, you need to use a stringstream. For example:

#include <sstream>
...
ostringstream strStream; // Construct an output string stream
float y = 3.14f;
string s = "PI: ";
strStream << s << y;
cout << strStream.str(); // outputs "PI: 3.14"
strStream.str(""); // Empties the stringstream

You also have an infinite outer while loop - a vector's size can never be negative. Additionally, you are constantly appending to the vector so it's size will never reduce...the code below compiles and runs, though you might want to rethink what you are trying to do...

#include <iostream>
//#include <conio.h>
#include <string>
#include <vector>
#include <sstream>

using namespace std;

main()
{
float qty, lastqty(0),proqty(0) ;
float width,lenght, panelw(0), panell(0),result(0), wholeframe(0), promeasure(0);
vector<string> list;
ostringstream strstream;

cout<<"Qty: ";
cin>>qty;
cout<<"Width: ";
cin>>width;
cout<<"Length: ";
cin>>lenght;

while (list.size() >= 0){
if(qty > 0){
result = width - 4.25;
panelw=result;
panell=lenght-4.25;
proqty=proqty+qty;
wholeframe=result+lenght;
promeasure=promeasure+wholeframe;

strstream << qty << " " << width << " X " << lenght << " " << result << " " << panelw << " X " << panell;
list.push_back(strstream.str());
strstream.str("");

cout<<"Qty: ";
cin>>qty;
cout<<"Width: ";
cin>>width;
cout<<"Length: ";
cin>>lenght;

}
int i=0;
while (i < list.size()){
cout<<list[i]<<endl;
i++;
}

}

}

boyracer87

Thanks man. that is exactly what i was trying to do.

cheers,
Ray