The exponent is interpreted as a signed integer, allowing negative as well as positive exponents.
作为有符号整数的指数可以有正负之分。
First, eight bits for the exponent should represent -128 to 127, just like a signed byte.
首先，表示指数的8位应该是从- 128到127，就像带符号的字节一样。
Long double IEEE double extended floating point exponent of 15 bits and signed fraction of 64 bits.
longdoubleIEEE双字节扩展浮点数15位指数，64位带符号小数。
A floating literal consists of an integer part, a decimal point, a fraction part, ane or e, an optionally signed integer exponent, and an optional type suffix.
浮点文字量由整数部分，小数点，小数部分，e或e，可选的有符号整数指数，以及可选的类型后缀组成。
A floating literal consists of an integer part, a decimal point, a fraction part, ane or e, an optionally signed integer exponent, and an optional type suffix.
浮点文字量由整数部分，小数点，小数部分，e或e，可选的有符号整数指数，以及可选的类型后缀组成。
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