program kalkulator; uses crt; var a,b,c:real; x:integer; Begin clrscr; Writeln('введите 2 числа'); Readln(a,b); Writeln('выберете действие'); Writeln('1-"+" 2-"-" 3-"*" 4-"/"'); Readln(x); case x of 1:begin c:=a+b; Writeln(c:2:2); end; 2:begin c:=a-b; Writeln(c:2:2); end; 3:begin c:=a*b; Writeln(c:2:2); end; elsebegin c:=a/b; Writeln(c:2:2); end; end; Readln; end.