Spécification du code doption


DefaultDefault - Aligner à gauche le résultat selon la largeur de champ donnée.

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Left align the result within the given field width. Aligner à droite. Right align. Sign appears only for negative signed values. If width is prefixed by 0, leading zeros are added until the minimum width is reached. If both 0 and - appear, the 0 is ignored. If 0 is specified for the a or A floating-point format, leading zeros are prepended to the mantissa, after the 0x or 0X prefix. Aucun remplissage. No padding.

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Use a blank to prefix the output value if it is signed and positive. No blank appears.

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When it's used with the o, x, or X format, the flag uses 0, 0x, or 0X, respectively, to prefix any nonzero output value. When it's used with the e, E, f, F, a, or A format, the flag forces the output value to contain a decimal point. La virgule décimale apparaît uniquement si des chiffres la suivent. Decimal point appears only if digits follow it. When it's used with the g or G format, the flag forces the output value to contain a decimal point and prevents the truncation of trailing zeros.

Ignored when used with c, spécification du code doption, i, u, or s.

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Les zéros de fin sont tronqués. Trailing zeros are truncated. In a conversion specification, the optional width specification field appears after any flags characters. The width argument is a non-negative decimal integer that controls the minimum number of characters that are output.

If the number of characters in the output value is less than the specified width, blanks are added to the left or the right of the values—depending on whether the left-alignment flag - is specified—until the minimum width is reached. If width is prefixed by 0, leading zeros are added to integer or floating-point conversions until the minimum width is reached, except when conversion is to an infinity or NaN.

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The width specification never causes a value to be truncated. If the number of characters in the output value is greater than the specified width, or if width isn't given, all characters of the value are output, subject to the precision specification. A missing or small width value in a conversion specification doesn't cause the truncation of an output value.

If the result of a conversion is wider than the width value, the field expands to contain the spécification du code doption result. Spécification de précisionPrecision specification Dans une spécification de conversion, le troisième champ facultatif concerne la spécification de précision. In a conversion specification, the third optional field is the precision specification.

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It consists of a period. Unlike the width specification, the precision specification can cause either truncation of the output value or rounding of a floating-point value. The type character determines either the interpretation of precision or the default precision when precision is omitted, as shown in the following table. The precision specifies the number of digits after the point. Default precision is If precision is 0, no decimal point is printed unless the flag is used.

The precision has no effect. Le caractère est imprimé.

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Character is printed. The precision specifies the minimum number of digits to be printed. If the number of digits in the argument is less than precision, the output value is padded on the left with zeros. The value is not truncated when the number of digits exceeds precision.

Default precision is 1. The precision specifies the number of digits to be printed after the decimal point. Le dernier chiffre imprimé est arrondi. The last printed digit is rounded.

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Default precision is 6. If precision is 0 or the period.

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The precision value specifies the number of digits after the decimal point. Si une virgule décimale apparaît, au moins un chiffre apparaît devant. If a decimal point appears, at least one digit appears before it. La valeur est arrondie au nombre approprié de chiffres.

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The value is rounded to the appropriate number of digits. If precision is 0, or if the period. The precision specifies the maximum number of significant digits printed.

Six chiffres significatifs sont imprimés et tous les zéros de fin sont tronqués. Six significant digits are printed, and any trailing zeros are truncated.

The precision specifies the maximum number of characters to be printed. Les caractères au-delà de precision ne sont pas imprimés.

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Characters in excess of precision aren't printed. Characters are printed until a null character is encountered. In a conversion specification, the size field is an argument length modifier for the type conversion specifier. The size field prefixes to the type field—hh, h, j, l lowercase LL, ll, t, w, z, I uppercase iI32, and I64—specify the "size" options binaires avec dépôt dinscription the corresponding argument—long or short, bit or bit, single-byte character or wide character—depending on the conversion specifier that they modify.

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These size prefixes are used with type characters in the printf and wprintf families of functions to specify the interpretation of argument sizes, as shown in the following table. The size field is optional for some argument types. When no size prefix is specified, the formatter consumes integer arguments—for example, signed or unsigned char, short, int, long, and enumeration types—as bit int types, and float, double, and long double floating-point arguments are consumed as bit double types.

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This behavior matches the default argument promotion rules for variable argument lists. For more information about argument promotion, see Ellipsis système doptions quasar Default Arguments in Postfix expressions.

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On both bit and bit systems, the conversion specification of a bit integer argument must include a size prefix of ll or I Sinon, le comportement du formateur n'est pas défini. Otherwise, the behavior of the formatter is undefined. Some types are different sizes in bit and bit code. To create platform-agnostic formatting code for variable-width types, you can use a variable-width argument size modifier.

Alternatively, use a bit argument size modifier and explicitly promote the variable-width argument type spécification du code doption 64 bits. The Microsoft-specific I uppercase i argument size modifier handles variable-width integer arguments, but we recommend the type-specific j, t, and z modifiers for portability. Préfixes de taille pour les spécificateurs de type de format printf et wprintfSize Prefixes for printf and wprintf Format-Type Specifiers Pour spécifierTo specify Avec le spécificateur de typeWith type specifier char.