[ad_1] Not sure what it is that is not compiling for you, but this is what you want: string over = yay.substr(yay.find(“over”),4); To break it down: yay.find(“over”) returns index of the first letter of “over” in ‘yay’, which is 16. yay.substr(16,4) extracts 4 characters from ‘yay’ starting at index 16. string over = yay.find(“over”); Does … Read more
[ad_1] What does the constant E do in the c language The documentation for floating-point constants is here. The form 1e2 or 1E2 means 1 times ten to the power of 2, and you’re perfectly correct that 2E-1 means 2 times ten to the power of -1, or 0.2. It’s based on the scientific E … Read more
[ad_1] You have cout << “Your elapsed time is ” << elapsedtime <<endl; Did you mean cout << “Your elapsed time is ” << elapsedtime(time1, time2) <<endl; Update For some reason, cout << “Your elapsed time is ” << elapsedtime <<endl; does not produce a compiler error under g++ 4.7.3 even though the intent is … Read more
[ad_1] If MyClass expects a DateTime, you should use the value from the DatePicker‘s SelectedDate property. It returns a Nullable<DateTime> that can be converted to a DateTime using the GetValueOrDefault() method: newObject = new Classes.MyClass(datePicker.SelectedDate.GetValueOrDefault()); If there is no date selected, GetValueOrDefault() will return DateTime.MinValue. The DatePicker doesn’t store the date in any particular format. … Read more
[ad_1] First of all, that’s a weird way to put goto to use. You don’t need a goto at all and can just use a simple loop instead. for(int i = 0; i < 10; i++) { if(i == 5) { printf(“Hello World “); } printf(“%i “, i + 1); } or if you really … Read more
[ad_1] You should call glutSwapBuffers only once in the drawing function. For an animation you have to call glutPostRedisplay, to ensure that the display function will be called again. The glBegin and glEnd calls only have to be called once per circle. In the for loop you just supply vertices with calls to glVertex. To … Read more
[ad_1] The problem is actually like counting in base sizeof(set) on length k (assuming the set has 10 items maximum). For instance, with a set of { 0, 1, 2 } on length 2, you count from 00 to 22, base 3. To solve the “one digit change only” constraint, instead of counting increasingly, do … Read more
[ad_1] 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. [ad_2] solved How to pass a … Read more
[ad_1] The type of foo is char[4], i.e. a character array containing 4 chars (including the trailing null character ‘\0’.) String literals can be used to initialize character arrays. If an array is initialized like char str[] = “foo”;, str will contain a copy of the string “foo”. The type of bar is char *, … Read more
[ad_1] The important thing from an efficiency standpoint is that the code doesn’t just continually cycle. In your example, presumably the wait() function is returning control to your OS so that it can immediately dispatch another task. In short, yes, your second example is power efficient as well, assuming wait() returns control to the the … Read more
[ad_1] The standard string.h header file does not define a data type called string, it provides functions for manipulating C-style strings, which are null-terminated character arrays. For example, you can do something like: #include <stdio.h> #include <string.h> int main(void) { char *myName = “paxdiablo”; printf(“Length of ‘%s’ is %zu\n”, myName, strlen(myName)); return 0; } Note … Read more
[ad_1] All is possible in this way -> to make c++ code which change password I done this: Password must be encrypted, so I used code to make it in $6$:SHA-512 hash. Must open /etc/shadow file, read it, find user by username and change password. There you can read about shadow file structure. To open … Read more
[ad_1] Try cout << “Add(+), Subtract(-), Multiply(*), Divide(/):” ; instead of cout << “Add(+), Subtract(-), Multiply(*), Divide(/):” << 2 [ad_2] solved C++ error: no match for ‘operator>>’ [closed]
[ad_1] Change your include to #include<string> The string.h contains functions to manipulate string, but not the std::string class. #pragma once Is to prevent headers for being included more then once, leading to duplicated symbols. In C++, #include means the compiler just replaces the #include with the contents of the file included. Imagine you have A.h … Read more
[ad_1] These *.d files usually (and just conventionally) are make dependencies (but perhaps, and unlikely, D-language source code). The GCC compiler knows about -M (and related) preprocessor option, which asks make to …. Instead of outputting the result of preprocessing, output a rule suitable for make describing the dependencies of the main source file. With … Read more