CODEWITHSUNDEEP
c++c
FullyAutomaticGames
FullyAutomaticGames

Reputation: 35

Is there a C equivalent of C++'s std::cin?

I'm trying to convert this code from C++ into C:

int num{0};
std::cin >> num;

I need an equivalent to std::cin. I've already tried:

int num = 0;
fgets (num, 0, stdin);

What can I do?

Upvotes: 0

Views: 267

Answers (2)

Adrian Mole
Adrian Mole

Reputation: 51825

Is there a C equivalent of C++'s std::cin

Not really. The C++ std::cin represents a specific instance of the std::istream class, for which the >> (formatted input) operator has a number of overloads (at least one of which is templated). Thus, that one operator can effectively handle a variety of different input types.

The closest thing that C has is the stdin file handle, which (generally speaking) represents the same input stream as std::cin. However, although you can use stdin in formatted input operations (like fscanf), you can also use the more general scanf function (which uses the same input stream).

However, you will need to specify the format options explicitly, for each input type (use %d for an int type), like so:

    int num = 0;
    scanf("%d", &num);

Or, for the more 'general' case:

    int num = 0;
    fscanf(stdin, "%d", &num);

Upvotes: 3

nit17
nit17

Reputation: 57

using scanf ("%d", &var); scanf will put the value of the input directly into var. it will wait until the user press Enter or any other key.

Upvotes: 0

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