[ad_1] This line of code: string checkuser = “select * from tb_Login where Username=”” + txtUsername.Text + “” and Password='” + txtPassword.Text + “‘ “; Is sending a query to the database and asking: “Give me all the columns from tb_Login whose UserName is the value in the txtUsername box and the Password is in … Read more
[ad_1] The following algorithm can me implemented with O(N+M) complexity. Take any vertex u. Use flood fill algorithm to reach other vertices. If any vertex is not reachable, return NOK. Now do the same, but go to the opposite direction. If any vertex is not reachable, return NOK. Return OK. (Here we know that there … Read more
[ad_1] if you write in header file static PFNGLGETERRORPROC glGetError; every c/cpp have own private copy of glGetError and it not conflict with other because it static – so different cpp files use different versions of glGetError – in one cpp unit you init one version and it !=0, when you enter to another cpp … Read more
[ad_1] Try to replace short RangeCheck(short word, short min, short max); char* prntword(short word); bool read(short *data, bool check); with short RangeCheck(short word, short min, short max){return 1;} char* prntword(short word){return 0;} bool read(short *data, bool check){return 0;} and it should compile for you (however it may not work as you expect) [ad_2] solved Undefined … Read more
[ad_1] for(int i=3;i>=0;i++){ Insert(&head,&a[i],int_size); } There is a memory error in your for loops, use “i–” instead of “i++” 1 [ad_2] solved Generic C++ Linked list
[ad_1] In C, string operations cannot have a convenient interface, because of memory management. If a function receives a string, and converts it to another string, you should decide how to declare its interface. The simplest interface is in-place (strtok uses it); you can use it only if the output is somehow smaller than input: … Read more
[ad_1] You could define a struct like this: struct tags { const char *name; int maxlen; char value[128]; }; struct tags tagList[] = { { “34”, 32, 0 }, { “43”, 16, 0 }, { “11”, 32, 0 }, … }; Then you could write your loop like this: for(int idx=0;idx<inum;idx++){ if( strlen(ArrLeftVar[idx]) < 1 … Read more
[ad_1] There in no straightforward answer on whether one should declare methods as static or not. It depends on the context and functionality of your application. Going with some assumptions for your situation, consider following thoughts on high level – If the validation is related to one particular form only, and not applicable for other … Read more
[ad_1] char code[1]; Arrays are treated like pointers (they “decay”) when passed to functions. More on Arrays decaying here: What is array decaying? cin>>code; >>is actually a function, so code is seen as a pointer to char. It treats a pointer to char as though it is a c-style string and attempts to null terminate … Read more
[ad_1] You absolutely don’t want the users password. But for your contact form to be able to send a mail it needs to be send by a valid email client. Say for example you want to use the gmail server for your mail, you need to provide your credentials for it. As for the second … Read more
[ad_1] The * is part of the type. book is of type Book *, that is a pointer to a Book. class Book { }; Book * book1 = new Book(); Book * book2 = book1; //now book1 and book2 point to the same Book 4 [ad_2] solved What is the significance of * in … Read more
[ad_1] Converted to decimal ascii string (not nul-terminated, buffer ‘large enough’) : size_t ultoa (char *buf, unsigned long u) { char *bptr = buf, *df, *dr; do *bptr = (‘0’) + (char) (u % 10); while ((u /= 10) != 0); for (df = buf, dr = bptr – 1; df < dr; ) { … Read more
[ad_1] You can’t make a video file into an executable. You can write a video player in Python which implements the functionality you desire and then use something like py2exe to make it into an executable, but that would involve writing a video player in Python. There is no programming language that will make a … Read more
[ad_1] You just compile it using your normal C++ compiler. Then compress the resulting .exe file using UPX. [ad_2] solved How to compile file .cpp to exe with comperssion natively? [closed]
[ad_1] You contradict yourself in the question by stating you need to use constants yet ask how to use variables – they’re diametrically opposed as far as the ideas go. One is constant the other is variable. Currently you use literals to construct your inputs, so you can swap them out easily enough. If you … Read more