getline

If I use the following code, getline doesn't take the last input(for last iteration of "for" loop, it simply skips it) - int main() { int n; map<string, set<string> > lst; string c,s,c2; cin>>n; for(int i=0;i<n;i++) { getline(cin,c); // here it skips the input for last iteration stringstream ss; ss<<c; bool f=1; while(ss>>s) { if(f) { c2=s; f=0; } else lst[c2].insert(s); } } for (map<string, set<string> >::const_iterator ci = lst.begin(); ci != lst.end(); ++ci) { cout<< (*ci).first <<" "<< (*ci).second.size() <<endl; } } To get rid of it, I put cin.ignore() after getline. Now its taking all

Possible Duplicate: Need help with getline() getline() is not working, if I use it after some inputs, i.e. #include<iostream> using namespace std; main() { string date,time; char journal[23]; cout<<"Date:\t"; cin>>date; cout<<"Time:\t"; cin>>time; cout<<"Journal Entry:\t"; cin.getline(journal,23); cout<<endl; system("pause"); } where as if I use getline() on top of inputs, it does work i.e. cout<<"Journal Entry:\t"; cin.getline(journal,23); cout<<"Date:\t"; cin>>date; cout<<"Time:\t"; cin>>time; What might be the reason? Characters are extracted until either (n - 1) characters have been

I have been working on a small exercise for my CIS class and am very confused by the methods C uses to read from a file. All that I really need to do is read through a file line by line and use the information gathered from each line to do a few manipulations. I tried using the getline method and others with no luck. My code is currently as follows: int main(char *argc, char* argv[]){ const char *filename = argv[0]; FILE *file = fopen(filename, "r"); char *line = NULL; while(!feof(file)){ sscanf(line, filename, "%s"); printf("%s\n", line); } return 1; } Right now I am getting a seg fault with

1022 Digital Library (30 分) A Digital Library contains millions of books, stored according to their titles, authors, key words of their abstracts, publishers, and published years. Each book is assigned an unique 7-digit number as its ID. Given any query from a reader, you are supposed to output the resulting books, sorted in increasing order of their ID's. Input Specification: Each input file contains one test case. For each case, the first line contains a positive integer N ( ≤) which is the total number of books. Then N blocks follow, each contains the information of a book in 6 lines: Line

1.输入string string s1; getline(cin,s1); cin>>s1; //注意cin遇到空格会终止，而getline不会 2.关于吞回车问题 输入n后要记得吞回车，不然只能输入两个字符串就结束 cin>>n; getchar();//加getchar()把输入n时的回车吃掉 getline(cin,s1); getline(cin,s2); getline(cin,s3); 来源： https://www.cnblogs.com/1911087165zzx/p/11343709.html

How do I check for end-of-file using the std::getline function? If I use eof() it won't signal eof until I attempt to read beyond end-of-file. 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 the difference) } Just read and then check that the read operation succeeded: std::getline(std::cin, str); if(!std::cin) { std::cout << "failure\n"; }

I am learning to use getline in C programming and tried the codes from http://crasseux.com/books/ctutorial/getline.html #include <stdio.h> #include <stdlib.h> #include <string.h> int main(int atgc, char *argv[]) { int bytes_read = 1; int nbytes = 10; char *my_string; my_string = (char *)malloc(nbytes+1); puts("Please enter a line of text"); bytes_read = getline(&my_string, &nbytes, stdin); if (bytes_read == -1) { puts ("ERROR!"); } else { puts ("You typed:"); puts (my_string); } return 0; } However, the problem is that the compiler keeps returning errors of this: undefined reference to

Possible Duplicate: getline not asking for input? There is some unique thing happening in my program. Here are some set of commands : cout << "Enter the full name of student: "; // cin name getline( cin , fullName ); cout << "\nAge: "; // cin age int age; cin >> age ; cout << "\nFather's Name: "; // cin father name getline( cin , fatherName ); cout << "\nPermanent Address: "; // cin permanent address getline( cin , permanentAddress ); When i try to run this snippet along with the whole code.The output program works like : output: Enter the full name of student: Age: 20 Father's Name: Permanent