The code presented by you in a C++ program. You need to save it in file.cpp format, after that you need to compile with g++ file.cpp and it should work. You have saved it file.c format and compiling it with gcc, which is C standard, not C++. solved can’t understand “std::cout”
The purpose of this tutorial you pointed out is to create the class AFloatingActor, which can then be instantiated. The RunningTimevariable is part of the interface of the class and since it is defined as public public: float RunningTime; it can be accessed outside the class (look at public/private class members and methods). Opposed to … Read more
The function isn’t the pointer. The return value is int * since it returns an array of int. You need a pointer to access an array. If it’s not a pointer, then you are expecting a single int variable. If it’s not static, then the array will be deallocated and gone when the function reached … Read more
You can do this with file operations in c, i am just giving you hints, FILE *pFilePtr; // file pointer(handle of file) pFilePtr = fopen(argv[1],”r”); //define buffer to store data read line by line data char buf[32]={0}; //Now you can run a while loop to read entire file with fread() to get whole first line(until … Read more
If there are more than one statements that you want to write in a loop or if statement, then you must use braces {} to define which statements come in the loop. In your code, only the printf(“Insert a non negative number: “); statement is in the loop, and nothing is changing the input‘s value … Read more
Did you maybe mean to do this: for (int i = 0; i < userString.length(); ++i) { if (isupper(userString[i])) { userString[i] = (tolower(userString[i])); } else if(islower(userString[i])) { userString[i] = (toupper(userString[i])); } } This will actually inverse. What you were doing before doesn’t work, and also only converts to uppercase 11 solved How to inverse string … Read more
I tested this on the server (I AM NOT ABLE TO RUN THIS CODE ON MY MACHINE). And apparently, the parameter a is stored in stack like char. If I am calling my program like this ./a 12345678 and print out *a[1] as long in hex format, I got the value 0x3837363534333231 I will say … Read more
Valgrind shows you, that everything is all right, nothing leaked: definitely lost: 0 bytes indirectly lost: 0 bytes possibly lost: 0 bytes solved Why any executable leaks memory?
Why does any combination of true and false return the value it does? There is no combination of any boolean here. This ?: operator returns first or second expression, not the condition itself. condition ? first_expression : second_expression; The condition must evaluate to true or false. If condition is true, first_expression is evaluated and becomes … Read more
You can’t put arbitrary statements at the file scope in C++, you need to put them in a function. #include <string> #include <fstream> #include <streambuf> #include <sstream> int main () { //These are now local variables std::ifstream t(“C:/Windows/System32/drivers/etc/hosts-backup.txt”); std::stringstream buffer; //We can write expression statements because we’re in a function buffer << t.rdbuf(); } 4 … Read more
You are confusing the scope of a variable with the storage duration. As mentioned in the C11 standard, chapter ยง6.2.1, Scopes of identifiers, for file scope […] If the declarator or type specifier that declares the identifier appears outside of any block or list of parameters, the identifier has file scope, which terminates at the … Read more
Add white space before %c => while (fscanf(pFile,” %c”, &alpArr[i++]) == 1); It should work. 1 solved Reading characters from a File with fscanf
The problem here is that you are trying to print the length before taking an input. The cout<<length will print a garbage value since length hasn’t been assigned yet. Try this instead. Also don’t use using namespace std; #include<iostream> int main(){ int length; std::cout << “Input length of a square in centimeter “; std::cin >> … Read more
Loop for( statement expression; action ) body loop is just a while loop { statement; while ( expression ) { body label_for_continue: action; } } So you can see that everything declared inside will have its life ending outside of for. You can use break to stop loop prematurely and continue to jump back to … Read more
you forgot to add ‘\0’ char in zero terminated char array, after you replaced value with index 2. 1 solved Assigning char array from ifstream breaks array if adding another char to array