Write a rudimentary spreadsheet program. Display a grid of cellswith columns A through H and rows 1 through 20. Accept input in thefirst row of the screen. The commands are of the form column rowentry, where entry is a number, a cell address preceded by a plus(e.g., +A5), a string, or a function preceded by an at sign, @. Thefunctions are: max, min, avg, and sum. During execution of yourprogram, build and modify the graph reflecting the situation in thespreadsheet. Show the proper values in proper cells. If a value ina cell is updated, then the values in all cells depending on itshould also be modified. For example, after the following sequenceof entries: A1 10
B1 20
A2 30
D1 +A1
C1 @sum(A1..B2)
D1 +C1 both cells C1 and D1 should display the number 60. Considerusing a modification of the interpreter from Chapter 5 as anenhancement of this spreadsheet so that arithmetic expressionscould also be used to enter values, such as C3 2*A1
C4 @max(A1..B2) -(A2 + B2) in C++ please . . .