std::cout << (Number*(Number+1)/2) << std::endl;
:)
or, if you want to learn programming, consider two loops. I am going to write the outer loop for you, because this is a good habit to get...
Type: Posts; User: grib
std::cout << (Number*(Number+1)/2) << std::endl;
:)
or, if you want to learn programming, consider two loops. I am going to write the outer loop for you, because this is a good habit to get...
Your best bet is to go ahead and give a meaningful name to the test, even if it's just is_valid(). This makes things easier to read and maintain. If you really want to have that magic test, write a...
copy(std::istream_iterator<std::string>(file), istream_iterator<std::string>(), std::back_inserter(vec));
Back_inserter works fine for anything that has a .push_back()
The other option is to use std::getline(std::cin >> std::ws, name); What this gets is a single line, not including terminator '\n', where the terminator is consumed, with no leading whitespace. This...
"Premature optimization is the root of all evil"
-- Donald Kunth
One of vectors tricks is that excess capacity is uninitialized. what this means is that the os will never have to allocate any...
x=0; is perfectly allowable inside a constructor, the problem is that inside the body of a constructor it's assignment, rather than construction. the correct way of doing this is ctor() : x(0), ......
when gWornArmorTravelersHead falls out of scope wornhead is pointing to undefined behavior. I don't see any reason that wornhead needs to be a pointer.
Prefixing an & to a variable returns the...
If your files are text you can also improve performance by writing a preprocessing step that will convert your text files into something like
struct element {
int x,y,z;
float value;...
template<class T>
bool parse(T &e, const std::string &s) {
std::istringstream iss(s);
return (iss >> e) && iss.eof();
// or, to accept trailing whitespace
return (iss >> e >>...
sqm_ is a pointer to an array of segments, to read or write all segments you will need to loop from sqm_[0] to sqm_[count_-1] and perform the correct operation on each. The C++ way to do this is to...
you can of course do this
int rmain(int argc, char *argv[]) {
// recursive whatever goes here
}
int main(int argc, char *argv[]) {return rmain(argc,argv);}
I am really not sure why you would...
I don't see where you are incrementing i, which appears to be a global. You also don't appear to have a need for a string stream at all.
fileout << TD[i].X << ", " << TD[i].Y << '\n'; will write...
Actually what volatile does is more like forces the compiler to allocate ordinary memory for a variable and to assume nothing when working with the variable. const volatile is really only used for...
It's by no means a trivial problem, the general field is known as Computer Vision, with your particular problem known as scene reconstruction. Most problems involving multiple images and scene...
Another common variant to take care of newlines in the input is
if(std::getline(std::cin >> std::ws,line) {
// Process line
}
std::ws is a manipulator that accepts only whitespace. You can...
binTree needs to be able to see the definitnion of binTNode(), not just the prototype. Thus
template<class T>
binTNode<T>::binTNode(const T& d=T(), binTNode<T>* l=0, binTNode<T>* r=0) :...
samp in your class is a stream varable, streams are, in general, non-copyable. The normal way to design something like this is to have a friend >> operator.
class Crypt {
...
friend...
cout << "Enter data: ";
while(cin >> data) {
if(valid) {
} else break;
cout << "Enter data: ";
}
The getline version that works with strings is a free function
std::string str;
std::getline(std::cin,str);
Note also the the pointer returned by c_str() is only good so long as the...
std::istringstream iss(myString);
int n;
if(iss >> n && iss.eof()) {
// myString is a properly formated number with no trailing characters or whitespace
// leading whitespace is ignored
}...
(a/b)*b + a % b = a
Or with decimals
14.8 is equal to 14 and eight tenths, eight is not the remainder of anything.
Eight tenths is equal to 4/5, that is the remander(4 or 74 % 5) divided by 5....
well .substr works on strings, but strlen() works on char *'s. The std::string equivilent to strlen() is s.length() or s.size(). Your code confused me, so I am just going to give you the stl style...
This is a good case study in why human readable file formats are nice. My guess would be that bin_read_string goes too far and consumes some of your stat data.
You can pass streams around by reference relatively freely, however this may not be quite what you want. If you want to search in a stream/file for a particular string you could do something like...
These are not the same things, although they all "work". Part of the joy and problem with c is that it's so easy to get confused. Pointers and arrays can usually be interchanged freely.
char...