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Questions tagged [stringstream]

stringstream provides an interface to manipulate strings as if they were input/output streams.

The objects of this class maintain internally a pointer to a stringbuf object that can be obtained/modified by calling member rdbuf. This streambuf-derived object controls a sequence of characters (string) that can be obtained/modified by calling member str.

1178 questions
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Writing to the stream buffer of a string stream overrides the previous data

What I want to do is to create string stream , and output stream, giving the buffer of string stream to output stream, so that it will output data to the string stream. Everything seems fine, but when I try to add data to buffer of the string…
Parviz Pirizade
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reading from a file and getting all strings after a string

I have something like this: while (getline(names_f, line) && getout == true) { istringstream linestream(line); linestream >> student_id >> student_name >> student_surname; As long as I have a function to consider if there is a middle name…
Oprasis
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How to prevent C++ string stream from reading double into int?

I want to write a function that reads an integer from a string and throws errors when encountering invalid inputs. Invalid inputs include non-digit and non-integer inputs. The following function detects non-digit inputs as invalid input but does not…
Mohammad Reza Bayat
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Problem extracting formatted input from an istringstream that has been set twice

Thanks for the help. My program reads lines from stdin. The first one has a single number which determines the mode at which the program is running, and the rest contain sequences of numbers of undetermined length. The number of lines is determined…
Javier de Muller Santa-María
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std::getline() does not ignore white space

I am new to C++ and I have some trouble preventing getline to read the new line character at the end of my text file. I tried truncating it using a newline character and then passing to a delimiter with ',' but it just doesnt work. Can you please…
readysetcode
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Difference between using << operator with stringsteam and write member function

I have observed that when a uint8_t type buffer (not guaranteed to be null terminated) is read into a stringstream with the << operator using ss << buff.data, and the contained std::string is returned to Python, Python throws an…
yashC
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Issue with stringstream/osstream not chaining << operator and never calling flush at std::end

So I have the following logging class #include #include #include #include struct asDigest { explicit asDigest(const void* text, size_t len) : _t(text), _l(len) {} explicit asDigest(const std::string&…
DannyBoi8181
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How can I pass std::basic_streambuf* into a function without #define

I have a simple log class that I want to use for logging which file, line, and function created the log message. I am passing the information in the following way: Logger::Log(LoggerLevel::ERROR, __FILE__ << ":" << __LINE__ << "::" << __FUNCTION__…
Xilnik
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About array in stringstream in C++

I want to design a program that inputs a string with space and output split string and the number of letters, but I don't know what the "word[]" means in "while (!ss.eof()){}". For example, I input "Programming is fun", the result…
timeil0611
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C++ "incomplete type is not allowed" when using stringstream

I have the following C++ code #include int main() { std::string sText = "These are words in my string!"; std::string sWord; std::stringstream ss(sText); } And it works fine on Fedora with g++. However, running it on Windows…
Dock
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Splitting a string in c++

I'm writing a function to reverse words in a string. My idea is to split a string by ' ', push the words into a stack and pop them out to print the string with their words reversed. But , I am not able to split the string using stringstream…
AnonymousMe
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I can only access elements of a vector while inside a for loop

I have a function with a vector that is passed in by reference. I am able to use the vector inside a for loop to write its contents to a file. However, if I try to access any index of the vector outside of the loop, is gives me this error: terminate…
janksmap
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Stringstream & char*[] segmentation fault

On my computer (Win10, WSL 1, Ubuntu 20.04) This code would compile and run correctly, #include #include #include using namespace std; int main() { ios::sync_with_stdio(false); char *test[30]; string a; …
Peter Qiu
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Can I ask and store input that can be both numbers or characters and use it in conditional expressions?

I am trying to use stroi in my "vending machine" code below. I had a working vending machine before I tried to add a feature that allows users to enter characters ("c" for checkout, "a" for add, and "r" for remove) as well. Since my user input can…
yeliah
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Unable to use stringstream to read in int and double

#include #include //for istringstream int main(){ std::istringstream iss; std::string tempSTR; int A; double B; std::cout<<"Please enter an int.\n"; std::cin>>tempSTR; iss.str(tempSTR); …
Mukasa Ricketts
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