ignore() function does the trick. By default, it discards all the input suquences till new line character. Other dilimiters and char limit can be specified as well. http://www.cplusplus.com/reference/istream/istream/ignore/ In your case it goes like this. cin >> N; cin.ignore();
This: cin>>n; Is reading the number only. It leaves the trailing ‘\n’ on the stream. So your first call to getline() is reading an empty line containing just a ‘\n’ It is best not to mix the use of operator>> and std::getline(). You have to be very careful on whether you have left the newline … Read more
getline is a POSIX function, and Windows isn’t POSIX, so it doesn’t have some POSIX C functions available. You’ll need to roll your own. Or use one that has already been written.
Characters are extracted until either (n – 1) characters have been extracted or the delimiting character is found (which is delimiter if this parameter is specified, or ‘\n’ otherwise). The extraction also stops if the end of the file is reached in the input sequence or if an error occurs during the input operation. When … Read more
The reason it’s appearing to skip the first iteration is because when you do cin >> size1; You enter a number and hit the Enter key. cin reads the integer and leaves the newline character unread on the buffer, so that when you call getline, it’s as if you immediately hit the enter key, and … Read more
Most likely you are trying to read a string after reading some other data, say an int. consider the input: 11 is a prime if you use the following code: std::cin>>number; std::getline(std::cin,input) the getline will only read the newline after 11 and hence you will get the impression that it’s not waiting for user input. … Read more
The canonical reading loop in C++ is: while (getline(cin, str)) { } if (cin.bad()) { // IO error } else if (!cin.eof()) { // format error (not possible with getline but possible with operator>>) } else { // format error (not possible with getline but possible with operator>>) // or end of file (can’t make … Read more
The other answers have covered most of this, but there are several problems. First, getline() is not in the C standard library, but is a POSIX 2008 extension. Normally, it will be available with a POSIX-compatible compiler, as the macros _POSIX_C_SOURCE will be defined with the appropriate values. You possibly have an older compiler from … Read more
Use the std::getline() from <string>. istream & getline(istream & is,std::string& str) So, for your case it would be: std::getline(read,x);
I’m puzzled. I looked at the link, read the description, and this is a fine utility. But, are you saying you simply can’t rewrite this function to spec? The spec seems quite clear, Here: /* This code is public domain — Will Hartung 4/9/09 */ #include <stdio.h> #include <stdlib.h> size_t getline(char **lineptr, size_t *n, FILE … Read more