这是一个模拟单片机的要求,在cpu不支持浮点运算的情况下.计算精确的浮点数.本算法是把输入的字符串变成IEE754标准运算(如果要提高精确度的话,很方便).在运算过程只运用了移位,和加减运算.-This is a simulation of the single-chip microcomputer, the cpu does not support floating-point operations circumstances. the precision floating point cal