1. Introducci´on al lenguaje de programaci´on C 1.1. Lenguaje C C es un lenguaje de programaci´on,creado a mediados de 1980 por Bjarne Strousstrup, como extensio´n del lenguaje C. Este lenguaje abarca tres paradigmas de la programaci´on: 1. Programacion Estructurada 2. Programacion Gen´erica 3. Programacion Orientada a Objetos En la.
2. The precision modifier has different meanings depending on the format command being used: With%e,%E, and%f, the precision modifier lets you specify the number of decimal places desired.For example,%12.6f will display a floating number at least 12 digits wide, with six decimal places. With%g and%G, the precision modifier determines the maximum number of significant.

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Las familias de funciones ? printf y ? scanf de entrada/salida en C++ soportan una cadena de texto conteniendo códigos y banderas de formato para indicar diferentes tipos y opciones de formato y justificación.

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[editar]Modificadores de Formato

Algunos de los códigos superiores pueden aceptar caracteres modificadores de formato para ajustar aún mejor la entrada o salida de datos de maneras específicas:

[editar]Ancho Mínimo

An integer placed between a % sign and the format command acts as a minimumfield width specifier, and pads the output with spaces or zeros to make it longenough. If you want to pad with zeros, place a zero before the minimum fieldwidth specifier:

You may also specify the minimum field width in an int variable if instead of anumber you put the * sign:

[editar]Precisión

You can also include a precision modifier, in the form of a .N where N is somenumber, before the format command:

The precision modifier has different meanings depending on the format commandbeing used:

• With %e, %E, and %f, the precision modifier lets you specify the number of decimal places desired. For example, %12.6f will display a floating number at least 12 digits wide, with six decimal places.
• With %g and %G, the precision modifier determines the maximum number of significant digits displayed.
• With %s, the precision modifier simply acts as a maximum field length, to complement the minimum field length that precedes the period.

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As with field width specifier, you may use an int variable to specify the precision modifier by using the * sign:

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[editar]Justificación

All of printf's output is right-justified, unless you place a minus signright after the % sign. For example,

will display a floating point number with a minimum of 12 characters, 4 decimalplaces, and left justified.

[editar]Tipos de Datos asociados

You may modify the %d, %i, %o, %u, and %x typespecifiers with the letter l and the letter h to specify long and short datatypes (e.g. %hd means a short integer).

The %e, %f, and %g type specifiers can have the letter l before them to indicate that a double follows. The %g, %f, and %e type specifiers can be preceded with the character # to ensure thatthe decimal point will be present, even if there are no decimal digits.

[editar]Base de numeración

The use of the # character with the %x type specifier indicates that the hexidecimalnumber should be printed with the 0x prefix.

The use of the # characterwith the %o type specifier indicates that the octal value should be displayedwith a 0 prefix.

[editar]Signo

Inserting a plus sign + into the type specifier will force positive values tobe preceded by a + sign. Putting a space character ' ' there will forcepositive values to be preceded by a single space character.

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You can also include constant escape sequences in the output string.