#include <iostream> using namespace std; int main() { int a=1025; int *p=&a; char *po; po=(char*)p; cout<<p<<po<<*po; // Now firstly I printed 'p' which gives "adress of a" //And after that when I tried printinf "po" and "*po" the compiler does not print anything in c++, but in c it will work. Why so? }

What you want to do?

Ok so let me explain the issue once more The above code works well in c But doesn't work well in c++ In c++ I am only able to print "p" and not "po" and "*po" Why so?

This is not an EXPLANATION. 1- What do you mean by it is works on X but not Y? 2- What error did you get? i don't see any error: https://wandbox.org/permlink/JmYrCZKj1mrFnLEn

This is not an EXPLANATION. 1- What do you mean by it is works on X but not Y? 2- What error did you get? i don't see any error: https://wandbox.org/permlink/JmYrCZKj1mrFnLEn

Did you get me?

Yeah, but i don't know the exact answer. Normally when you derefrencing a char* the compiler also interpreted it as a char and when passed through operator<<(std::ostream&, char*) it also try to print it as a ASCII code. So when you point to a int variable with a char* pointer, then you break the value interpretation.

Can anyone help

I can't send media in here...

can anyone help solving a problem. Given an integer n we have to decompose this integer into all possible sum of distinct integers. for instance if n = 10 then the output should be 1+9 2+8 3+7 4+6 4+5+1 4+3+2+1

can anyone help solving a problem. Given an integer n we have to decompose this integer into all possible sum of distinct integers. for instance if n = 10 then the output should be 1+9 2+8 3+7 4+6 4+5+1 4+3+2+1

J[] begins at A008; what will be the address of J-2?

depends on type

J[] begins at A008; what will be the address of J-2?

If its char Result is A00A

If its char Result is A00A

Hi guys. Am just a beginner in c++ language. Which framework is the best for creating GUI I also want to create a who want to be a millionaire software. Any recommendations

ImGui

Hi guys. Am just a beginner in c++ language. Which framework is the best for creating GUI I also want to create a who want to be a millionaire software. Any recommendations

#include<iostream> #include<fstream> #include<string> using namespace std; class Car { private: string carCompany; float costCar; int numberAirbags; public: Car(){} Car(string carCompany,float costCar,int numberAirbags){ this->carCompany=carCompany; this->costCar=costCar; this->numberAirbags=numberAirbags; } string getCarCompany(){ return this->carCompany; } float getCostCar(){ return this->costCar; } int getNumberAirbags(){ return this->numberAirbags; } }; int main() { const string FILE_NAME="Cars.txt"; //Creating an array of objects of class Car Car cars[5]; cars[0]=Car("Audi",25000,4); cars[1]=Car("Ford",15000,2); cars[2]=Car("BMW",25400,2); cars[3]=Car("Honda",45604,4); cars[4]=Car("Fiat",14556,4); //write the array of objects into file. ofstream carsOfstream(FILE_NAME, ios::out); for(int i=0; i<5; ++i){ carsOfstream <<cars[i].getCarCompany() << " "<<cars[i].getCostCar()<< " "<< cars[i].getNumberAirbags()<< "\n"; } carsOfstream.close(); //read ifstream carsIfstream(FILE_NAME); if(!carsIfstream) { cerr << "Error: open file '"<<FILE_NAME<<"' for reading\n"; return 1; } string carCompany; float costCar; int numberAirbags; int counter=0; string line; //read from file while(carsIfstream>>carCompany>>costCar>>numberAirbags){ cars[counter]=Car(carCompany,costCar,numberAirbags); counter++; } carsIfstream.close(); //Search the data by carcompany from the stored file and display the result. string carcompanyTarget; int numbeOfCar=0; cout<<"Enter car company: "; getline(cin,carcompanyTarget); for(int i=0;i<5;i++) { if(cars[i].getCarCompany()==carcompanyTarget){ cout <<"Car company: "<<cars[i].getCarCompany() << ", Cost car: "<<cars[i].getCostCar()<< ", Number of airbags: "<< cars[i].getNumberAirbags()<< "\n"; numbeOfCar++; } } if(numbeOfCar==0){ cout<<"\nNot found\n\n"; } system("pause"); return 0; }

use a pastbin service

I'm getting error for the above program

Just fix it

what is the difference between std::uint8_t and uint8_t?

the std namespace prefix

hi guys im junior in c, and i looking for good mentor for study C. where i can find mentors?! thanks

To look for a mentor, go into your room, lock the door, pick up a book online, stack up problems to solve up to 1000...put on your computer, then start learning and coding. Then you'll be surprised how you'll be of more benefit to yourself than a mentor

To look for a mentor, go into your room, lock the door, pick up a book online, stack up problems to solve up to 1000...put on your computer, then start learning and coding. Then you'll be surprised how you'll be of more benefit to yourself than a mentor

You have to write two programs to transform input array into output array. Part 1 Input Array :  2,4,8,5,12,15,6,10,7,30,25,43,46,45,21 Output Array :  2,4,8, 12, 6, 7, 43,46,21, 5,15,10,30,25,45   Part 2 Input Array :  2,4,8,5,12,15,6,10,7,30,25,43,46,45,21 Output Array :  2,4,8,21,12,46,6,43 ,7,30,25,10,15,45,5

part 1. it seem its take out modulo 5 into separate list?

How

A mentor doesn't have to teach you know. Books also do not have experience in C. In fact which book should one use as a guide. That's why you need a mentor to push and pull you

hi guys im junior in c, and i looking for good mentor for study C. where i can find mentors?! thanks

Go ask Elon Musk who was his mentor that taught him how to program. Go ask Jeff Bezos who was his programming mentor, go ask Bill Gates who was his mentor while he coded games at a young age. Go ask Bjarne Stroustrup who was his mentor. Children of nowadays want everything at their plate. A mentor is not to pull and push you, your WHY should do that. A mentor is just to show you the steps to take, for example, go learn the fundamentals of c++ first, then code and code and code with that knowledge. Then come back and learn more advanced tips like abstraction, etc. You don't need a mentor for anything other than that. And this days of internet mentors are all in the internet offering their online class, so go join all and learn from all and see how each mentors solve the same tasks in different ways. Ask for pulling and pushing yourself, it's up to YOU

if u wanted to change the original variable, u wud instead pass a pointer to it : void setValue(int *variable) { *variable = 650; // This will write 650 to the address where original variable resides } int main() { int variable = 326; setValue(&variable); // This will pass a copy of a pointer to where variable resides printf("Variable : %d\n",variable); // Will now print 650 :D }

i can delcare uint8_t var1, without namespace std

int variable = 326; in this case is a local variable, it resides on memory area called stack. &variable means the address of variable. So basically it's the address of stack. void setValue(int *variable); is a function that its first argument accepts a pointer to an integer. Pointer is simply just an address, you can read/write the value of memory from pointer by dereferencing it.

so those two variables one in main func and other in setvalue func are totally different from each other?

Yes they are different, but they have relation. On main function, it is where the variable actually stored. On setValue, it is just an address that points to the variable that is stored on the main's stack frame.

do i need to read books? to get these concepts cause in video tutorial they dont teach in depth like this?

Probably you should.

i will be happy if you suggest some books specially which explains pointers and arrays well

i will be happy if you suggest some books specially which explains pointers and arrays well

Try this one @laugh https://www.teainside.org/rpx/21/27/b5/73/f1/Art%20Of%20Intel%20x86%20Assembly.pdf

Lipman

will check out thanks 👍

will check out thanks 👍