[收藏]使用scanf输入double格式的数据问题

最新推荐文章于 2025-03-05 21:37:02 发布

欧阳嘉

最新推荐文章于 2025-03-05 21:37:02 发布

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文章标签： character whitespace integer function input each

本文详细介绍了格式化输入函数中格式说明符的构成及其各部分的作用，包括百分号开头的格式说明符、可选的抑制赋值字符、宽度指定符、指针大小修饰符等，并解释了如何使用这些组件来正确读取不同类型的变量。

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正确格式为%lf,scanf("%lf",double type variable);

原文地址：http://www.programfan.com/club/showpost.asp?id=22045&t=o

┌────────────────────────────────────────┐
│  ...scanf Format Specifiers                                                    │
├────────────────────────────────────────┤
│In ...scanf format strings, format specifiers have the following form:          │
│                                                                                │
│  % [ * ] [width] [F|N] [h|l|L] pe_char                                         │
│                                                                                │
│Each format specifier begins with the percent character (%).                    │
│                                                                                │
│After the % come the following, in this order:                                  │
│                                                                                │
│┌─────┬────────────────────────────────┐│
││Component │What It Is/Does                                                 ││
│├─────┼────────────────────────────────┤│
││ [ * ]    │(Optional) Assignment-suppression character                     ││
││          │Suppresses assignment of the next input field.                  ││
││ [width]  │(Optional) Width specifier                                      ││
││          │Specifies maximum number of characters to read; fewer           ││
││          │characters might be read if the ...scanf function encounters    ││
││          │a whitespace or unconvertible character.                        ││
││ [F|N]    │(Optional) Pointer size modifier                                ││
││          │Overrides default size of address argument:                     ││
││          │  N = near pointer                                              ││
││          │  F = far pointer                                               ││
││ [h|l|L]  │(Optional) Argument-type modifier                               ││
││          │Overrides default type of address argument:                     ││
││          │  h = short int                                                 ││
││          │  l = long int, if type_char specifies integer conversion       ││
││          │  l = double, if type_char specifies floating-point conversion  ││
││          │  L = long double, (valid only with floating-point conversion)  ││
││ type_char│(Required) Type character                                       ││
│└─────┴────────────────────────────────┘│
└────────────────────────────────────────┘