Cin, Cin. Get (), Cin. Getline (), Getline (), gets (), etc.

A few C ++ input functions are always unclear. Let's sum up!

1. Cin

1. Cin. Get ()

2. Cin. Getline ()

3. Getline ()

4. Gets ()

5. getchar ()

　　

1. Cin>

　　

Usage 1: the most basic and common usage. Enter a number:

　　

# Include

Using namespace STD;

Main ()

{

Int A, B;

Cin> A> B;

Cout <

Using namespace STD;

Main ()

{

Char A [20];

Cin>;

Cout <

Using namespace STD;

Main ()

{

Char ch;

Ch = cin. Get (); // or CIN. Get (CH );

Cout <

Using namespace STD;

Main ()

{

Char A [20];

Cin. Get (A, 20 );

Cout <

Using namespace STD;

Main ()

{

Char M [20];

Cin. Getline (M, 5 );

Cout <

# Include

Using namespace STD;

　　

Main ()

{

Char M [3] [20];

For (INT I = 0; I <3; I ++)

{

For cout <"/N, enter the" <"string:" <"output M [" <"] value:" <"

　　

# Include

# Include

Using namespace STD;

Main ()

{

String STR;

Getline (CIN, STR );

Cout <"

　　

# Include

# Include

Using namespace STD;

Main ()

{

Char M [20];

Gets (m); // cannot be written as M = gets ();

Cout <

# Include

Using namespace STD;

　　

Main ()

{

Char M [3] [20];

For (INT I = 0; I <3; I ++)

{

For cout <"/N, enter the value of" <"string:" <"output M [" <: "<> it can also be used because no space is entered here. If a space is entered, for example, "Ks KR jkl [Press enter]", CIN will have received three strings: "Ks, KR, jkl "; for example, if "kskr 1 [Press enter] kskr 2 [Press enter]", then "kskr, 1, kskr" is received. This is not the result we want! Cin. Getline () and gets () do not generate this error because they can receive spaces;

　　

6. getchar () // accepts one character and must contain "# include"

　　

# Include

# Include

Using namespace STD;

Main ()

{

Char ch;

Ch = getchar (); // cannot be written as getchar (CH );
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A few C ++ input functions are always unclear. Let's sum up!

1. Cin

1. Cin. Get ()

2. Cin. Getline ()

3. Getline ()

4. Gets ()

5. getchar ()

　　

1. Cin>

　　

Usage 1: the most basic and common usage. Enter a number:

　　

# Include

Using namespace STD;

Main ()

{

Int A, B;

Cin> A> B;

Cout <

Using namespace STD;

Main ()

{

Char A [20];

Cin>;

Cout <

Using namespace STD;

Main ()

{

Char ch;

Ch = cin. Get (); // or CIN. Get (CH );

Cout <

Using namespace STD;

Main ()

{

Char A [20];

Cin. Get (A, 20 );

Cout <

Using namespace STD;

Main ()

{

Char M [20];

Cin. Getline (M, 5 );

Cout <

# Include

Using namespace STD;

　　

Main ()

{

Char M [3] [20];

For (INT I = 0; I <3; I ++)

{

For cout <"/N, enter the" <"string:" <"output M [" <"] value:" <"

　　

# Include

# Include

Using namespace STD;

Main ()

{

String STR;

Getline (CIN, STR );

Cout <"

　　

# Include

# Include

Using namespace STD;

Main ()

{

Char M [20];

Gets (m); // cannot be written as M = gets ();

Cout <

# Include

Using namespace STD;

　　

Main ()

{

Char M [3] [20];

For (INT I = 0; I <3; I ++)

{

For cout <"/N, enter the value of" <"string:" <"output M [" <: "<> it can also be used because no space is entered here. If a space is entered, for example, "Ks KR jkl [Press enter]", CIN will have received three strings: "Ks, KR, jkl "; for example, if "kskr 1 [Press enter] kskr 2 [Press enter]", then "kskr, 1, kskr" is received. This is not the result we want! Cin. Getline () and gets () do not generate this error because they can receive spaces;

　　

6. getchar () // accepts one character and must contain "# include"

　　

# Include

# Include

Using namespace STD;

Main ()

{

Char ch;

Ch = getchar (); // cannot be written as getchar (CH );