Description: In the calculator design, addition, subtraction and parentheses have priority functions, parentheses precedence over multiplication and division, multiplication and division take precedence over addition and subtraction.
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File list (Check if you may need any files):
计算器有优先\MSSCCPRJ.SCC
............\计算器.frm
............\计算器.frx
............\计算器.vbp
............\计算器.vbw
............\计算器1.exe
计算器有优先