Given the following: struct cell { int num1; float num2; } ; struct Person { int

Question

Given the following: struct cell { int num1; float num2; } ; struct Person { int age; float income; }; Cell t, s; Person p1, p2, p3; s.num1 = 0; s.num2 = 2.5; //initialize s p2.age = 25; p2.income = 9999.99; //initialize p2 t = s; //assignment one p1 = s; //assignment two p2 = p3; //assignment three p3.age = s.num1; //assignment four p3.income = s.num1; //assignment five p2.age = t.num2; //assignment six 2) (12pts) For each assignment state whether it will compile or not and why. Also list if there will be any coercions or widening or shortening of datatypes. 3) (6pts) Analyze and write a comparison of C

Explanation / Answer

struct cell {

int num1;

float num2;

} ;

struct Person {

int age;

float income;

};

struct cell t, s;

Person p1, p2, p3;

s.num1 = 0;

s.num2 = 2.5; //initialize s

p2.age = 25;

p2.income = 9999.99; //initialize p2

t = s; //assignment one good, same types

p1 = s; //assignment two error, different types with no overload of = sign

p2 = p3; //assignment three good, same types

p3.age = s.num1; //assignment four good, both are ints

p3.income = s.num1; //assignment five good, but widening of int to float

p2.age = t.num2; //assignment six good, but shortening num2 by casting from float to int

malloc/free works similar to new/delete. Both of them try to allocate memory.

On failure to allocate memory, malloc returns a null pointer and new would thow std::bad_alloc.

new/delete calls the constructor/destructor of object it creates while malloc/free does not.

new/delete is considered to be safer in the sense that Cpp has a type-safety check.

refer to this link for your opinion:

http://stackoverflow.com/questions/240212/what-is-the-difference-between-new-delete-and-malloc-free

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