输入运算结果和操作数，然后该程序通过对操作数运算匹配，若雨运算结果相符则输出算术表达式，表达式的输出格式为1 +2 /3 +4=5,按从左至右顺序计算，目前只支持对+-*/这四类运算符的匹配-Enter the result of the operation and operands, then the program matches the number of operations by the operator, if the rain is consistent with the outp