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Asked: 2020-04-02 18:15:19 +0800 CST 2020-04-02 18:15:19 +0800 CST

Using the ampersand & in c to store value in variables

  • 772

in this code

printf("ingrese el numero a guardar");
scanf("%i",&a);

What is the function of aspersand(&) when saving the value and what is its name?

c

2 Answers

  1. Best Answer

    Functions in C (most) start with a lowercase.

    The del function scanf(tipo, &var);must specify the type of data to read and the variable. in the types can be %i -> Integer , %s-> cadena , %f -> float , %c -> caracter (the most common)

    The other parameter it receives is the variable, but first the & ampersandone that is used to indicate a memory address of the variable where the data will be stored appears.

    Bearing in mind that this is omitted &when it comes to variables of type string or arraycharacter.

    Why is it Omitted?

    When a type variable is declared, entero , flotante o charit is assigned a memory address, how does it C scanfknow in which address it will store the entered value? using the operator & (by reference) , for an array or a String , the variable will also have the address of the first element, it is no longer necessary to pass the &since it will know where to start writing the value orValores

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  2. First two clarifications:

    • the method is printfand not "Printf".
    • the method is scanfand not "Scanf".

    The value you enter is actually being stored in the variable a, and in this case it must be an integer type, this is an example:

    int a;
printf("ingrese el numero a guardar");
scanf("%i", &a);
printf("El valor del numero a guardar es: %i", a);

    Using the C language when we send values ​​to a function it can be done in two ways:

    • Worth
    • Reference

    In this case the ampersand ( &) means indicating the memory address of the variable, sending the value by reference.

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