Question

could you say me what is the mistake in my following code?

    char* line=""; 

printf("Write the line.\n");
scanf("%s",line);
printf(line,"\n");

I’m trying to get a line as an input from the console.But everytime while using “scanf” the program crashes. I don’t want to use any std, I totally want to avoid using cin or cout. I’m just trying to learn how to tak a full line as an input using scanf().

Thank you.

Answer 1

You need to allocate the space for the input string as sscanf() cannot do that itself:

char line[1024]; 

printf("Write the line.\n");
scanf("%s",line);
printf(line,"\n");

However this is dangerous as it’s possible to overflow the buffer and is therefore a security concern. Use std::string instead:

std::string line;

std::cout << "Write the line." << std::endl;
std::cin >> line;
std::cout << line << std::endl;

or:

std::getline (std::cin, line);