#Michael phew code#

#Michael phew code#

I have tested the code below and it successfully changes the constant member variables. Non-const variables or volatile variables are not allowed. a const variable which is itself initialized with a pure constant expression. 2, 10.53Ī symbolic constant defined by #define directiveĪ pure const variable i.e. In C++, if a const variable is initialized with a pure constant expression, then its value cannot be modified through its pointer even after try to modify, otherwise a const variable can be modified through its pointer.Ī pure integral const variable can be used as length in an array declaration, if its value is greater than 0.Ī pure constant expression consists of the following operands.Ī numeric literal (constant ) e.g. A const variable can be never used as length in an array declaration. In C, a const variable can be modified through its pointer however it is undefined behavior. In C++, Using Microsoft Visual Studio-2008 const int a = 3 /* I promisse i won't change a */ Any other attempt to do so will result in a compiler error somewhere. You'll have to use either a C-style cast or a C++-style const_cast to remove the const-ness. In C++, it is impossible to modify a const object without using a typecast of some sort. *ppx = &x // but now this is an error because *ppx is 'const' You're only allowed to add const without a cast at the FIRST level of indirection: int * const *ppx = &px // this is ok It's a very non-intuitive result, but the only way to make sure that you can't modify a const object in this case (note how there are no typecasts) is to make line 3 an error. *px = 4 // oops, just modified a const object *ppx = &x // ok, assigning 'const int*' to 'const int*' The reason is that if you could do this, you could accidentally modify a const object: const int x = 3 Ĭonst int **ppx = &px // ERROR: conversion from 'int**' to 'const int**' Just a guess, but a common question is why one can't convert an int** to a const int**, which at first appears to be reasonable (after all, you're just adding a const, which is normally ok). so that may be the issue you are experiencing.

I found that g++ doesn't allow this to happen.

Linux ~ $ g++ constTest2.cpp -o constTest2ītw. Their diligence with planning allowed the 380th AEW mission to never miss a beat.'Ī great amount of effort went into acknowledging the hurdles the Tuskegee Airmen had to overcome and allowed the aircrew to fly with the 'Spirit of Tuskegee.You need to cast away the constness: linux ~ $ cat constTest.cĬonst int a = 3 // I promisse i won't change aĪlso the common answer doesn't work in g++ 4.1.2 linux ~ $ cat constTest2.cpp 'They were very supportive of this occasion. 'The 908th EARS staff had to make adjustments to an already intense operations tempo,' said Captain Cato. Sergeant Smith originally proposed the idea of the commemorative flight because the unit had not had an opportunity to do something like this before, said Lieutenant Brown.Ĭoordination for the flight was a challenge because the members of the aircrew do not typically fly together. The first black Airmen to become pilots were trained at Tuskegee Army Air Field in Tuskegee Ala., earning them the name 'The Tuskegee Airmen.' The mission was an important way to end Black History Month because it honored the years of labor and political struggle endured by the Tuskegee Airmen so that minorities may have the opportunity to serve their country in the field of aviation, said Captain Cato. Michael Smith, boom operator all from the 908th Expeditionary Air Refueling Squadron, joined together to fly a KC-10 extender into a war zone in support of current combat operations. Elton Phew, flight engineer and Staff Sgt. SOUTWEST ASIA - In honor of the last day of Black History Month, an all-black aircrew from the 380th Air Expeditionary Wing flew a combat mission here Feb.

380th Air Expeditionary Wing Public Affairs.