Answering my own question. void callJavaScript(std::string script) { std::cout << script << “\n”; } #define callJavaScript(…) callJavaScript(#__VA_ARGS__) Now you can call like this, callJavaScript({ console.log(“Hello World”) }) You can compile this then it will output {console.log(“Hello World”)} If anyone has a better way with templates, please do tell. solved How to pass a String without … Read more
Or is the problem in the rest of the code? Possibly. Perhaps you’ve corrupted your stack somehow, so that you’re “returning” from main to someplace you didn’t expect. We can’t really know without an complete, verifiable example. How can I make it finish after returning 0? You can use the kill command on MacOS to … Read more
When I give out my answer, it’s yet unclear that what name your input text file has. Let’s suppose the name of your text file is test.txt and it locates right within the same directory as the C++ source file, test.cpp. test.txt Car,Red,ZX342DC test.cpp #include <fstream> #include <string> #include <regex> #include <iostream> using namespace std; … Read more
I don’t know where you got data from, but you need to change it to array<int, 3> or make compareByValue a template: bool compareByValue(const array<int, 3> &a, const array<int, 3>&b) { return a[0] < b[0]; } 2 solved Sorting vector of arrays by array’s element
As a first approximation, I’d make the most minimal changes necessary to the code that makes you happy: std::ifstream infile(“filename”); for(int i = 0; i <CLASS_SIZE; i++) { for(int j = 0; j <10 ; j++) { // scanf(“%d”, &grade); infile >> grade; studentsInClass[i].setGrade(j,grade); } } Given that you know the exact number of grades … Read more
Try WriteData(std::string(“\0”,1)); using your function or even: const char null_data(0); send(newsockfd,&null_data,1,0); to send it directly. WriteData(“00000000”); Will actually sends 8 octets of 48 [decimal] (assuming your platform is ASCII which all modern systems are compatible with). However \0 is the escape sequence used in string literals to represent the null character (that is the zero … Read more
Here’s how c++11 has made compile time programming (slightly) easier template <typename UIntType> constexpr bool IsPowerOfTwo(UIntType r) { return (r & (r – 1)) == 0; } namespace detail { template<class UIntType, UIntType r, bool> struct ModuloHelper; template<class UIntType, UIntType r> struct ModuloHelper<UIntType, r, true> { template<class T> static T calc(T value) { return value … Read more
You have your main problem here. double *tabT1; double *tabT2; tabT1[0]=1; tabT1[1]=tabX[j]*(-1); tabT2[0]=1; tabT2[1]=tabX[i]*(-1); You haven’t allocated the memory, instead, you have just declared the double ptrs tabT1 and tabT2 and accessing them by pretending you have allocated. double *tabT1 = new double[2]; double *tabT2 = new double[2]; will fix this, however, I strongly suggest … Read more
we are using push_back on an rvalue No, that’s not the problem. any stores a copy of what it is given. It doesn’t reference some other object. It creates an object from what it is given. So even if you get a reference to the object in the any, it wouldn’t be a reference to … Read more
One slightly unrelated suggestion I have for your a==0 error check is to use a do while statement instead of having your program close. It would look like this: do { cout << “Enter a number for a: “; cin >> a; if (a==0) { cout << “Can’t use 0 for a.”; } } while … Read more
Introduction Quadratic equations are a type of mathematical equation that involve a variable raised to the second power. Solving a quadratic equation can be a difficult task, but with the right knowledge and tools, it can be done quickly and easily. In this article, we will discuss how to solve a quadratic equation using C++ … Read more
You made a couple of mistakes #include <math.h> #include <iostream> using namespace std; int main() { char ch1, ch2; for (int i=i; i<=20; i++) { int a = rand () % 20; cout << “The number is: ” << a << endl; ch2 = ‘y’; //You only need to loop until its square root; after … Read more
If you are puzzled about the dots here is what they are: %.1lf is the format specification for precision. This is requesting one digit after the decimal point in the printf output. The 1. and 2. in (a*1.+b)/2. mean that those literals are double (as opposed to 1 that would be int and 1.f that … Read more
count = int(input()) values = [int(input()) for _ in range(count)] for v in values: # alternatively, print(” “.join(str(v) for v in values)) print(v) 4 solved how to insert numbers in a list c++ style using python [duplicate]
This is not going to be the fastest data structure & algorithm for your particular purpose I guess, but it may be fast enough. Test it yourself. Note that a std::forward_list or even a std::vector might be faster depending on the actual scenario (-> constant factors in big-O-notation). tmyklebu mentioned another approach in the comments: … Read more