为什么我的c++运行很久，还会输出写奇奇怪怪的东西

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原创最新推荐文章于 2026-03-13 00:18:49 发布 1k 阅读 AI 写同款· GEO 优化 ›

Windows MinGW配置C、C++编译环境写在前面的前面：这篇文章vscode和cpp插件版本有点老了，仅供大家参考，最新的和最详细的更新见我的另一篇文章：https://blog.youkuaiyun.com/bat67/article/details/76095813 写在前面：由于这学期（或者说这一年）一直在忙别的，也没什么闲心看博客了，近期发现自己的这篇文章:整理：Visual Studio Code (vscode) 配置C、C++环境/编写运行C、C++（Windows）竟然有了好多访问，也有不少童鞋问各种问题，非常感谢大家的支持，本来是. 阅读详情

运行后会输出一下内容

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.

GCC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.

You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */

/*
* ISO C Standard: 5.2.4.2.2 Characteristics of floating types <float.h>
*/

#ifndef _FLOAT_H___
#define _FLOAT_H___

/* Radix of exponent representation, b. */
#undef FLT_RADIX
#define FLT_RADIX __FLT_RADIX__

/* Number of base-FLT_RADIX digits in the significand, p. */
#undef FLT_MANT_DIG
#undef DBL_MANT_DIG
#undef LDBL_MANT_DIG
#define FLT_MANT_DIG   __FLT_MANT_DIG__
#define DBL_MANT_DIG   __DBL_MANT_DIG__
#define LDBL_MANT_DIG   __LDBL_MANT_DIG__

/* Number of decimal digits, q, such that any floating-point number with q
decimal digits can be rounded into a floating-point number with p radix b
digits and back again without change to the q decimal digits,

   p * log10(b)           if b is a power of 10
   floor((p - 1) * log10(b))   otherwise
*/
#undef FLT_DIG
#undef DBL_DIG
#undef LDBL_DIG
#define FLT_DIG       __FLT_DIG__
#define DBL_DIG       __DBL_DIG__
#define LDBL_DIG   __LDBL_DIG__

/* Minimum int x such that FLT_RADIX**(x-1) is a normalized float, emin */
#undef FLT_MIN_EXP
#undef DBL_MIN_EXP
#undef LDBL_MIN_EXP
#define FLT_MIN_EXP   __FLT_MIN_EXP__
#define DBL_MIN_EXP   __DBL_MIN_EXP__
#define LDBL_MIN_EXP   __LDBL_MIN_EXP__

/* Minimum negative integer such that 10 raised to that power is in the
range of normalized floating-point numbers,

   ceil(log10(b) * (emin - 1))
*/
#undef FLT_MIN_10_EXP
#undef DBL_MIN_10_EXP
#undef LDBL_MIN_10_EXP
#define FLT_MIN_10_EXP   __FLT_MIN_10_EXP__
#define DBL_MIN_10_EXP   __DBL_MIN_10_EXP__
#define LDBL_MIN_10_EXP   __LDBL_MIN_10_EXP__

/* Maximum int x such that FLT_RADIX**(x-1) is a representable float, emax. */
#undef FLT_MAX_EXP
#undef DBL_MAX_EXP
#undef LDBL_MAX_EXP
#define FLT_MAX_EXP   __FLT_MAX_EXP__
#define DBL_MAX_EXP   __DBL_MAX_EXP__
#define LDBL_MAX_EXP   __LDBL_MAX_EXP__

/* Maximum integer such that 10 raised to that power is in the range of
representable finite floating-point numbers,

   floor(log10((1 - b**-p) * b**emax))
*/
#undef FLT_MAX_10_EXP
#undef DBL_MAX_10_EXP
#undef LDBL_MAX_10_EXP
#define FLT_MAX_10_EXP   __FLT_MAX_10_EXP__
#define DBL_MAX_10_EXP   __DBL_MAX_10_EXP__
#define LDBL_MAX_10_EXP   __LDBL_MAX_10_EXP__

/* Maximum representable finite floating-point number,

   (1 - b**-p) * b**emax
*/
#undef FLT_MAX
#undef DBL_MAX
#undef LDBL_MAX
#define FLT_MAX       __FLT_MAX__
#define DBL_MAX       __DBL_MAX__
#define LDBL_MAX   __LDBL_MAX__

/* The difference between 1 and the least value greater than 1 that is
representable in the given floating point type, b**1-p. */
#undef FLT_EPSILON
#undef DBL_EPSILON
#undef LDBL_EPSILON
#define FLT_EPSILON   __FLT_EPSILON__
#define DBL_EPSILON   __DBL_EPSILON__
#define LDBL_EPSILON   __LDBL_EPSILON__

/* Minimum normalized positive floating-point number, b**(emin - 1). */
#undef FLT_MIN
#undef DBL_MIN
#undef LDBL_MIN
#define FLT_MIN       __FLT_MIN__
#define DBL_MIN       __DBL_MIN__
#define LDBL_MIN   __LDBL_MIN__

/* Addition rounds to 0: zero, 1: nearest, 2: +inf, 3: -inf, -1: unknown. */
/* ??? This is supposed to change with calls to fesetround in <fenv.h>. */
#undef FLT_ROUNDS
#define FLT_ROUNDS 1

#if defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
/* The floating-point expression evaluation method.
-1 indeterminate
0 evaluate all operations and constants just to the range and
precision of the type
1 evaluate operations and constants of type float and double
to the range and precision of the double type, evaluate
long double operations and constants to the range and
precision of the long double type
2 evaluate all operations and constants to the range and
precision of the long double type

??? This ought to change with the setting of the fp control word;
the value provided by the compiler assumes the widest setting. */
#undef FLT_EVAL_METHOD
#define FLT_EVAL_METHOD __FLT_EVAL_METHOD__

/* Number of decimal digits, n, such that any floating-point number in the
widest supported floating type with pmax radix b digits can be rounded
to a floating-point number with n decimal digits and back again without
change to the value,

   pmax * log10(b)           if b is a power of 10
   ceil(1 + pmax * log10(b))   otherwise
*/
#undef DECIMAL_DIG
#define DECIMAL_DIG   __DECIMAL_DIG__

#endif /* C99 */

#if defined (__STDC_VERSION__) && __STDC_VERSION__ >= 201112L
/* Versions of DECIMAL_DIG for each floating-point type. */
#undef FLT_DECIMAL_DIG
#undef DBL_DECIMAL_DIG
#undef LDBL_DECIMAL_DIG
#define FLT_DECIMAL_DIG       __FLT_DECIMAL_DIG__
#define DBL_DECIMAL_DIG       __DBL_DECIMAL_DIG__
#define LDBL_DECIMAL_DIG   __DECIMAL_DIG__

/* Whether types support subnormal numbers. */
#undef FLT_HAS_SUBNORM
#undef DBL_HAS_SUBNORM
#undef LDBL_HAS_SUBNORM
#define FLT_HAS_SUBNORM       __FLT_HAS_DENORM__
#define DBL_HAS_SUBNORM       __DBL_HAS_DENORM__
#define LDBL_HAS_SUBNORM   __LDBL_HAS_DENORM__

/* Minimum positive values, including subnormals. */
#undef FLT_TRUE_MIN
#undef DBL_TRUE_MIN
#undef LDBL_TRUE_MIN
#if __FLT_HAS_DENORM__
#define FLT_TRUE_MIN   __FLT_DENORM_MIN__
#else
#define FLT_TRUE_MIN   __FLT_MIN__
#endif
#if __DBL_HAS_DENORM__
#define DBL_TRUE_MIN   __DBL_DENORM_MIN__
#else
#define DBL_TRUE_MIN   __DBL_MIN__
#endif
#if __LDBL_HAS_DENORM__
#define LDBL_TRUE_MIN   __LDBL_DENORM_MIN__
#else
#define LDBL_TRUE_MIN   __LDBL_MIN__
#endif

#endif /* C11 */

#ifdef __STDC_WANT_DEC_FP__
/* Draft Technical Report 24732, extension for decimal floating-point
arithmetic: Characteristic of decimal floating types <float.h>. */

/* Number of base-FLT_RADIX digits in the significand, p. */
#undef DEC32_MANT_DIG
#undef DEC64_MANT_DIG
#undef DEC128_MANT_DIG
#define DEC32_MANT_DIG   __DEC32_MANT_DIG__
#define DEC64_MANT_DIG   __DEC64_MANT_DIG__
#define DEC128_MANT_DIG   __DEC128_MANT_DIG__

/* Minimum exponent. */
#undef DEC32_MIN_EXP
#undef DEC64_MIN_EXP
#undef DEC128_MIN_EXP
#define DEC32_MIN_EXP   __DEC32_MIN_EXP__
#define DEC64_MIN_EXP   __DEC64_MIN_EXP__
#define DEC128_MIN_EXP   __DEC128_MIN_EXP__

/* Maximum exponent. */
#undef DEC32_MAX_EXP
#undef DEC64_MAX_EXP
#undef DEC128_MAX_EXP
#define DEC32_MAX_EXP   __DEC32_MAX_EXP__
#define DEC64_MAX_EXP   __DEC64_MAX_EXP__
#define DEC128_MAX_EXP   __DEC128_MAX_EXP__

/* Maximum representable finite decimal floating-point number
(there are 6, 15, and 33 9s after the decimal points respectively). */
#undef DEC32_MAX
#undef DEC64_MAX
#undef DEC128_MAX
#define DEC32_MAX __DEC32_MAX__
#define DEC64_MAX __DEC64_MAX__
#define DEC128_MAX __DEC128_MAX__

/* The difference between 1 and the least value greater than 1 that is
representable in the given floating point type. */
#undef DEC32_EPSILON
#undef DEC64_EPSILON
#undef DEC128_EPSILON
#define DEC32_EPSILON   __DEC32_EPSILON__
#define DEC64_EPSILON   __DEC64_EPSILON__
#define DEC128_EPSILON   __DEC128_EPSILON__

/* Minimum normalized positive floating-point number. */
#undef DEC32_MIN
#undef DEC64_MIN
#undef DEC128_MIN
#define DEC32_MIN   __DEC32_MIN__
#define DEC64_MIN   __DEC64_MIN__
#define DEC128_MIN   __DEC128_MIN__

/* Minimum subnormal positive floating-point number. */
#undef DEC32_SUBNORMAL_MIN
#undef DEC64_SUBNORMAL_MIN
#undef DEC128_SUBNORMAL_MIN
#define DEC32_SUBNORMAL_MIN __DEC32_SUBNORMAL_MIN__
#define DEC64_SUBNORMAL_MIN __DEC64_SUBNORMAL_MIN__
#define DEC128_SUBNORMAL_MIN __DEC128_SUBNORMAL_MIN__

/* The floating-point expression evaluation method.
-1 indeterminate
0 evaluate all operations and constants just to the range and
precision of the type
1 evaluate operations and constants of type _Decimal32
   and _Decimal64 to the range and precision of the _Decimal64
type, evaluate _Decimal128 operations and constants to the
   range and precision of the _Decimal128 type;
   2 evaluate all operations and constants to the range and
   precision of the _Decimal128 type. */

#undef DEC_EVAL_METHOD
#define DEC_EVAL_METHOD __DEC_EVAL_METHOD__

#endif /* __STDC_WANT_DEC_FP__ */

#endif /* _FLOAT_H___ */
#include_next <float.h>

显示最后一行出错，可这个代码并不是我写的

就连个数组输入输出也卡半天，这是什么情况