Multiple inputs on one line

Question

I have looked to no avail  and I m afraid that it might be such a simple question that nobody dares ask it   Can one input multiple things from standard input in one line  I mean this   float a  b  char c      It is safe to assume a  b  c will be in float  float  char form  cin  gt  gt  a  gt  gt  b  gt  gt  c

User · Answer

Yes  you can  From cplusplus com   Because these functions are operator overloading functions  the usual way in which they are called is     strm  gt  gt  variable   Where strm is the identifier of a istream object and variable is an object of any type supported as right parameter  It is also possible to call a succession of extraction operations as     strm  gt  gt  variable1  gt  gt  variable2  gt  gt  variable3         which is the same as performing successive extractions from the same object strm   Just replace strm with cin

User · Answer

Yes  you can input multiple items from cin  using exactly the syntax you describe  The result is essentially identical to   cin  gt  gt  a  cin  gt  gt  b  cin  gt  gt  c    This is due to a technique called  operator chaining    Each call to operator gt  gt  istream amp   T   where T is some arbitrary type  returns a reference to its first argument   So cin  gt  gt  a returns cin  which can be used as  cin gt  gt a  gt  gt b and so forth   Note that each call to operator gt  gt  istream amp   T  first consumes all whitespace characters  then as many characters as is required to satisfy the input operation  up to  but not including  the first next whitespace character  invalid character  or EOF

[c++] Multiple inputs on one line

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