Take a look at remove_if() #include <iostream> #include <algorithm> #include <string> using namespace std; int main() { string s; getline(std::cin,s); cout << s << endl; s.erase (std::remove_if(s.begin (), s.end (), ispunct), s.end ()); cout << s << endl; } 4 solved Removing punctuation from string of characters [closed]
Haven’t used C++ in a while but i think it should look something like this if(x%2 == 0) { std::cout << x << “is even\n”; } else { std::cout << x << “is odd\n”; } your errors are because you were basically saying cout << x; “is even”; which doesn’t make sense to the compiler … Read more
Your functions are using passing by value, therefore, a copy is seen within the function. Please read about passing by reference void lire_tab(vector<int>& A); solved issue with std vector in c++ [closed]
You have a member function: void func_A(int a, T initvalue = T()) {} that can be called like this: mc.func_A(1); Then you have an overloaded member function: void func_A(int a) {} that can also be called like this: mc.func_A(1); How could the compiler know which function you intend to call by that line? Answer: It … Read more
C++11 solution #include <iostream> #include <chrono> #include <thread> int main() { using namespace std::literals; std::this_thread::sleep_for(5s); std::cout << “Hello world” << std::endl; } Read more http://en.cppreference.com/w/cpp/thread/sleep_for solved taking specific time then output result?
As you mentioned “I did not understand what the code is doing”, let me briefly describe how to iterate through a container: The long way: vector<int> result = { 1,2,3 }; for (vector<int>::iterator it = result.begin(); it != result.end() ; it++) { int i = *it; cout << i << ” “; } Each container … Read more
Yes, a B can access protected members of an A. But it’s the fact that you’re going through v3 that makes it essentially irrelevant that this attempt is made from within a member function of B. It’s v3 trying to make the access, not B::calculate, and v3 is not a B&. [C++11: 11.4/1]: [..] All … Read more
The algorithm follows from what you have. Structure your while-loop like this: while(!fin.eof()) { bool found = false; do { fin.get(ch); found = found || ch == ‘d’; } while (ch == ‘d’ && fin); if (found && ch == ‘o’) { // boom goes the dynamite } } The purpose of the do-while is … Read more
C++: What is best way to destruct this code? You mean to free resources. In case of unordered_map The way to do it right is not to do it. A unordered_map will automatically release resources when it’s destroyed for anything allocated automatically. Unless you allocated the values with new, you don’t delete them. In case … Read more
Now, the question states that at most 2 out of A, B, C are non-positive. So, it means that condition that includes the 3 numbers and returns true would be 1. !(A =< 0 && B =< 0 && C <= 0) Here, we know that either one of A, B or C is greater … Read more
You already used the two important words that are key to undestand why what you intend is not possible, but you probably haven’t grasped their full meaning: Statement and expression. The if statement (like all statements) does not yield a value, while the ?: operator is an expression that does yield a value. Distinguishing between … Read more
You probably want lambda or std::function, or std::bind auto l_add_100 = [](double x) { return add_two_numbers(x, 100); }; std::function<double(double)> f_add_100 = [](double x) { return add_two_numbers(x, 100); } auto b_add_100 = std::bind(add_two_numbers, std::place_holder::_1, 100); or with non hard coded number double y = //… auto l_add_y = [y](double x) { return add_two_numbers(x, y); } std::function<double(double)> … Read more
This syntax in invalid. You cannot simply write code inside a class definition. Instead, you can write a function and your code will work inside it: class Foo { public: void bar() { int * p = new int; *p = 5; } }; int main(int argc, char ** argv) { Foo f; f.bar(); } … Read more
Call bubbleSort(rain, MAX_MONTHS); in main with these changes : void displayRainfall(string months[MAX_MONTHS], double rain[MAX_MONTHS], int monthCount) { //title cout << “Monthly Rainfall for 2014” << endl; //print minimum rainfall cout << “Minimum: ” << months[MAX_MONTHS-1] << ” “<< rain[MAX_MONTHS-1] << endl; //print maximum rainfall cout << “Maximum: ” << months[0] << ” “<< rain[0] << … Read more
1 – All the entities (variables, types, constants, and functions) of the standard C++ library are declared within the std namespace. using namespace std; introduces direct visibility of all the names of the std namespace into the code. ref: http://www.cplusplus.com/doc/tutorial/namespaces/ 2 – Namespaces in C++ are most often used to avoid naming collisions. Although namespaces … Read more