摘要：many tools that created BY PEOPLE to solve the problem of calculation,starting from the Abacus primitive count tool to a modern calculator. acalculator helps the calculation done quickly and accurately. To complete thecalculator program,this research discussed about completing of matematicfunction in a calculator. the research is limited with the making of formula notthe process and adding of support calculator. Function or formula that will beadded into the program will be discussed one by one, and the discussion will begiven algorithm and procedures used to establish programs of their respectivefunctions. Key Words : Borland Delphi 7.0, calculator, tool
