Goto: A little summary of C + + input line string

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http://www.wutianqi.com/?p=1181

When we learn C + + programming, we generally use CIN in terms of input.
CIN uses whitespace (spaces, tabs, and line breaks) to set the bounds of a string.
This leads to strings with spaces , such as "I love C + + Struggle Paradise Forum"
Only "I" can be read, and the latter cannot be read in.
What happens then?

One. For character arrays:
Method One: Getline ()
Reads the entire row of data, using the line break entered by the ENTER key to determine the end of the input.
Calling method: Cin.getline (str, len);
The first parameter, STR, is the array name used to store the input rows, and the second parameter, Len, is the number of characters to read.

1 #include <iostream>
2 using namespace Std;
3
4 int Main ()
5 {
6 Char str[30];
7 Cin.getline (str, 30);
8 cout << str << Endl;
9 return 0;
10}

Method two: Get ()

Calling method: Cin.get (str, len);

1 #include <iostream>
2 using namespace Std;
3
4 int Main ()
5 {
6 Char str[30];
7 Cin.get (str, 30);
8 cout << str << Endl;
9 return 0;
10}

So what's the difference between the two?
Both read a line of input until the line break.
Then,getline discards the newline character, and get () retains the newline character in the input sequence .
Therefore, when you use Cin.get () to enter multiple rows of data, you can use get () to eliminate line breaks in the middle.

1 #include <iostream>
2 using namespace Std;
3
4 int Main ()
5 {
6 Char str1[30], str2[30];
7 Cin.get (STR1, 30);
8 Cin.get ();
9 Cin.get (STR2, 30);
Ten cout << "str1:" << str1 << Endl;
cout << "str2:" << str2 << Endl;
return 0;
13}

Because get (str, len) and get () are all class members of CIN, they can be combined to write:

1 #include <iostream>
2 using namespace Std;
3
4 int Main ()
5 {
6 Char str1[30], str2[30];
7 cin.get (STR1,). get (); Watch this!
8 Cin.get (STR2, 30);
9 cout << "str1:" << str1 << Endl;
Ten cout << "str2:" << str2 << Endl;
return 0;
12}

(Welcome everyone to my forum study: C + + struggle Paradise: Www.cppleyuan (dot) com)

Two. For the String class
Method One: Getline (CIN, str)

This shows that the getline here is not a class method.

1 #include <iostream>
2 #include <string>
3 using namespace Std;
4
5 int Main ()
6 {
7 string str;
8 Getline (CIN, str);
9 cout << str << Endl;
return 0;
11}

Goto: A little summary of C + + input line string