Consider for (int i = 0; i < *length; i++) where both i and *length are 0, as in your case… will that loop ever execute? Nope… Consider a loop that starts with x set to 0 and return x; when str[x] is ‘\0’. i.e. the loop in strlen does this. As for printing backwards, … Read more
if in the project folder there is a .sln (solution) file, open it in Visual Studio and run the project to see if it works. Then you can modify it. If you don’t find the .sln file you have to look for a README file, or something like this. 🙂 solved How to compile c++ … Read more
There are up to 8 directions you can move in from any position on the grid. The dx and dy arrays represent the x and y axis offsets of the adjacent cells. Iterating over the elements pairwise gives you: index dir x y 0 e 1 0 1 se 1 1 2 n 0 1 … Read more
This is because both the following operations are different : 5 * M_PI / 4 and 5 / 4 * M_PI The operations are performed left to right. On the first line, 5 * M_PI (int * float) returns a float (15.7…) which is divided by an int (float / int) returning a float (3.9…). … Read more
As of Visual C++ 2015 Update 3, it is now possible to specify a language version for language behavior (apparently it doesn’t affect just conformance checking): https://blogs.msdn.microsoft.com/vcblog/2016/06/07/standards-version-switches-in-the-compiler/ Unfortunately the only options are “C++14” (not exact, it includes post-C++14 features which had previously shipped) and “C++ Latest” (C++14 plus partial implementation of C++17 and proposals, but … Read more
Presuming you have twelve months in your input file, you’re reading past the end of your arrays. Replace: for(int i=0;i<=count;i++) { with: for( int i=0; i < count; ++i ) { 0 solved Access violation reading location 0xCCCCCCCC [closed]
Since you’re allocating a char array but do not initialize it, strlen() will count from the beginning of the tab pointer to the first NUL character. So the result depends on the contents of your program’s heap. 3 solved Strlen returns undefined behaviour with C++ [duplicate]
Your code does not make any sense. There are many problems with what you have written I’m not going to go through them all, but the most glaring is if (option == 1) { void addcontact(info contactlist[]); } This is not how a function is called. Instead, it should look like if (option == 1) … Read more
The hint is in the warnings: the #include <string> is ignored because it’s apparently after the include of the precompiled header file. Make sure the precompiled header is included first. Background: If the corresponding project setting is enabled, the Visual C++ Compiler will, in a pre-preprocesser step, replace the line #include “stdafx.h” (this is the … Read more
class Number : public string { public: Number() : string(“0”) { } Number(const string &str) : string(str) { } }; However, as long as you have the following 2 lines in the beginning, the name Number will be replaced by preprocessor. #ifndef Number #define Number You should use another macro name for the #include guard. … Read more
empty() is not “an iterator member function”. You are not calling empty() on the iterator – you are dereferencing the iterator, and calling empty() on the vector element that the iterator refers to. It might be clearer if you replace iter->empty() with an equivalent form (*iter).empty() In still other words, auto iter = vec.begin(); iter->empty(); … Read more
I don’t know where you get your analysis from. Most parts like the abstract syntax tree is kept because it is used in all different passes. It might be that some, especially simple compilers don’t free stuff because it’s not considered necessary for a C compiler. It’s a one shot compilation unit operation and than … Read more
I found similar question on stackoverflow : How do I generate random numbers without rand() function? I make little modifications for generating between 0-35 and final solution: #include<stdio.h> #include<time.h> int main() { int num = 36; time_t sec; sec=time(NULL); for(;;) { sec=sec%3600; if(num>=sec) { printf(“%ld\n”,sec); break; } sec=sec%num; } return 0; } Here we are … Read more
Uhm, first of all your title references one error and your question shows another. Both are legitimate so let’s fix both, shall we? The thing is the C4716 error message tells you exactly what the error is: you just have to read it. It says that the function student::standing() claims to return a string but … Read more
As far as I can understand from your comments in your question and answers, you are in a very bad situation: your instructor is BADLY USING THE WRONG TOOL TO DO THE JOB (It will be interesting if he read this site as well). It is teaching you OOP using a non-OOP-pure language (like C++) … Read more