CODEWITHSUNDEEP
c++charinttype-conversion
dari1495
dari1495

Reputation: 289

Some conversion questions for C++

I'm doing a distributed program(I'm don't know if this is the word, I learned in spanish), where I need to send and receive messages between some processes, pretty simple at first sight.

It gets complicated when I want to send two ints in the same message. With send() you can only send char* so I used this:

string s = to_string(valla) + " " + to_string(tiempo);
const char* buffNum = s.c_str();

All good until I have to receive and 'decode' the message. So if I receive one single number I can use atoi(), now the question is, how do I do this when I receive two?

Thanks in advance.

Upvotes: 0

Views: 74

Answers (1)

πάντα ῥεῖ
πάντα ῥεῖ

Reputation: 1

const char* buffNum = s.c_str();

yields undefined behaviour dereferencing buffNum, as soon s is changed or goes out of scope.

To decode if you're sure your string is fine, use std::istringstream:

std::istringstream iss(buffNum);

int num1, num2;

iss >> num1 >> num2;

Upvotes: 6

Related Questions