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三、设计一个四则运算的比赛程序,其中加减法是四位整数的运算,乘除法的被乘数(或被除数)为四位整数,乘数(或除数)为1位整
Third, to design a four-computing game program, in which the addition and subtraction is a four-digit integer operation. The multiplicand (or dividend) of the multiplication and division is a four-digit integer, and the multiplier (or divisor) is a 1-bit integer.