Homework Answers
| variables visible in S1 | program units in which they declared |
| a | main function |
| b | procedure s1 |
| c | procedure s1 |
| x | procedure s1 |
| variables visible in s2 | program units in which they are declared |
| a | main function |
| x | procedure s1 |
| b | procedure s1 |
| c | procedure s1 |
| n | procedure s2 |
| m | procedure s2 |
| k | procedure s2 |
| variables visible in s3 | program units in which they are declared |
| a | procedure s3 |
| x | procedure s3 |
| b | procedure s1 |
| c | procedure s1 |
| n | procedure s2 |
| m | procedure s2 |
| k | procedure s2 |
| l | procedure s3 |
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3- (3 pts) Consider the following Pascal program skeleton program main var a, b, c: integer;...
CONCEPTS OF PROGRAMMING LANGUAGE Consider the following skeleton program skeleton. List all the variables, along with...
CONCEPTS OF PROGRAMMING LANGUAGE Consider the following skeleton program skeleton. List all the variables, along with the program units where they are declared, that are visible in the bodies of Sub1, Sub2, and Sub 3, assuming static scoping is used. Procedure Main is X, Y, Z: Integer; procedure Sub1 is A, Y, Z: Integer; begin -- of Sub1 ... end; -- of Sub1 procedure Sub2 is A, X, W: Integer; procedure Sub3 is A, B, Z: Integer; begin -- of...
CONCEPTS OF PROGRAMMING LANGUAGE Consider the following program skeleton Procedure Main is X, Y, Z: Integer;...
CONCEPTS OF PROGRAMMING LANGUAGE Consider the following program skeleton Procedure Main is X, Y, Z: Integer; procedure Sub1 is A, Y, Z: Integer; begin -- of Sub1 ... end; -- of Sub1 procedure Sub2 is A, B, Z: Integer; begin -- of Sub2 ... end; -- of Sub2 procedure Sub3 is A, X, W: Integer; begin -- of Sub3 ... end; -- of Sub3 begin - of Main ... end; -- of Main Given the following calling sequences and assuming...
8. (10%) Consider the following JavaScript program: // The main program var x,y; function f10{ var...
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Given the following Ada program: procedure Main is X, Y: Integer; procedure Sub1 is Y, Z:...
Given the following Ada program: procedure Main is X, Y: Integer; procedure Sub1 is Y, Z: Integer; begin -- of Sub1 point 1 Sub2; end; -- of Sub1 procedure Sub2 is X: Integer; procedure sub3 (B: Integer) is W: Integer; begin -- of Sub3 point 2 end; -- of Sub3 begin -- of Sub2 point 3 Sub3 (X); end; -- of Sub2 begin -- of Main point 4 Sub1; end; -- of Main For each of the four marked points,...
Consider the following program, written in JavaScript-like syntax: // main program var x, y, z; function...
Consider the following program, written in JavaScript-like syntax: // main program var x, y, z; function sub1() { var a, y, z; . . . } function sub2() { var a, b, z; . . . } function sub3() { var a, x, w; . . . } Given the following calling sequences and assuming that dynamic scoping is used, what variables are visible during execution of the last subprogram activated? Include with each visible variable the name of the...
Consider the following JavaScript skeletal program: //the main program var x: function sub1 () { var...
Consider the following JavaScript skeletal program: //the main program var x: function sub1 () { var x: function sub2 () { } } function sub3 () { } Assume the execution of this program is in the following unit order: main calls sub1 sub1 calls sub2 sub2 calls sub3 a. Assuming static scoping, which declaration of x is the correct one for a reference to x in: i. sub1 ii. sub2 iii. sub3 b. Repeat part a, but assume dynamic...
4.The following questions refer to the skeletal C++ program shown below. a.Assume that static scoping is...
4.The following questions refer to the skeletal C++ program shown below. a.Assume that static scoping is used. List all variables, along with the functions in which they are declared, that are visible at Line 1 in the program. b. Repeat part (a), but list the variables along with the functions in which they are declared that are visible at Line 2. c. Repeat part (a), but list the variables along with the functions in which they are declared that are...
For the given program determine what is printed after each write statement assuming static scoping, deep...
For the given program determine what is printed after each write statement assuming static scoping, deep binding and parameters are passed-by-value-result. program main; var X: integer; procedure Q(var I: integer; function R(J: integer):integer); var X: integer; begin X:=4; write(“In Q, before call of R, I=”, I, “X=”, X); I=R(I); write(“In Q, after call of R, I=”, I, “X=”, X); end; procedure P; var I: integer; ...
Consider the following program written in C syntax int a , b , c ; //...
Consider the following program written in C syntax int a , b , c ; // first declaration void g() { print(a,b,c); } int f(int a) // parameter declaration { int b; // second declaration b = a + 1; g(); // first call { int a; // third declaration int c; // fourth declaration c = b; a = b + c; g(); // second call } g(); // third call return a + b ; } int main()...
(24) (2 marks) Consider the following skeletal program, written in a lan- guage with static scope. procedure Main; proc...
(24) (2 marks) Consider the following skeletal program, written in a lan- guage with static scope. procedure Main; procedure A procedure B: procedure C begin C end C begin B end B procedure D procedure E begin E end E begin D end D begin A end A begin ain end Nain Imagine that the following procedure calls have taken place: Main calls A A calls D D calls E E calls B B calls C i. Drawthe run time...
8. (10%) Consider the following JavaScript program: // The main program var x,y; function f10{ var y, z; function f20{ var x, Z, P; function f30{ var x, z, ; Assume that the execution of this program is in the following unit order: main calls f3, f3 calls f1, f1 calls 12. a) Assuming that static scoping is in effect, indicate which version of each of the following variables will be visible in f2 by filling in each blank with...
Given the following Ada program: procedure Main is X, Y: Integer; procedure Sub1 is Y, Z: Integer; begin -- of Sub1 point 1 Sub2; end; -- of Sub1 procedure Sub2 is X: Integer; procedure sub3 (B: Integer) is W: Integer; begin -- of Sub3 point 2 end; -- of Sub3 begin -- of Sub2 point 3 Sub3 (X); end; -- of Sub2 begin -- of Main point 4 Sub1; end; -- of Main For each of the four marked points,...
Consider the following JavaScript skeletal program: //the main program var x: function sub1 () { var x: function sub2 () { } } function sub3 () { } Assume the execution of this program is in the following unit order: main calls sub1 sub1 calls sub2 sub2 calls sub3 a. Assuming static scoping, which declaration of x is the correct one for a reference to x in: i. sub1 ii. sub2 iii. sub3 b. Repeat part a, but assume dynamic...
(24) (2 marks) Consider the following skeletal program, written in a lan- guage with static scope. procedure Main; procedure A procedure B: procedure C begin C end C begin B end B procedure D procedure E begin E end E begin D end D begin A end A begin ain end Nain Imagine that the following procedure calls have taken place: Main calls A A calls D D calls E E calls B B calls C i. Drawthe run time...
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