Visual C++ and C programming

[BadKarma]

DavidCrow wrote:

Visual Studio v6 handles this just fine. He is doing something else wrong as his code compiles fine as a .c file or a .cpp file. I suspect it's the type of project he chose.

When I tested the code i wrongfully pasted the code in a .cpp file which led to the unresolved error which I mentioned. I do however used VS2005 to test. When renamed to a .c file everything compiles and links without a problem. Sorry to add up the confusion :) codito ergo sum

[thierrypp]

again error: C:\Documents and Settings\atvd\Desktop\New Folder00ppp\wwww\wwww.cpp(72) : error C2440: '=' : cannot convert from 'void *' to 'struct etudiant *' Conversion from 'void*' to pointer to non-'void' requires an explicit cast Error executing cl.exe. wwww.exe - 1 error(s), 0 warning(s)

[BadKarma]

The default compiler options needs a pre compiled header. You should add #include "stdafx.h" to the begining of your code. Another solution is to remove this option from your compile directive. Its been a long time since I used VC++6.0 but I think this is what you should do. 1. open project properties from menu or press Alt+F7 2. select the file ooooo.cpp in the tree view 3. select compile options in the right form. 4. select pre compiled header from the combo box 5. set the radio button to disable the use of pre-compiled headers. codito ergo sum

[thierrypp]

same problem..... C:\Documents and Settings\atvd\Desktop\New Folder00ppp\uuuu\uuuu.cpp(31) : warning C4508: 'main' : function should return a value; 'void' return type assumed

[Graham Bradshaw]

Does this article[^] help at all?

[thierrypp]

thank you...but I turned it and tested it.....same ..errors listen, I do not want to abuse too much... my mail is thierrypp@yahoo.com if you want, I will send you a typical set of files and you could send me screenshots? I would be very grateful if you could. I am working on Visual C++ 6.0 with standard edition provided with Ivor Horton book, and indeed I made a lot of successful applications with VC++ 6.0. But with C.....I followed before your link and after and the problems remains...what a pity! Thanks a lot! The big problem is that the company left for several months nobody in charge of managing this and after restructuration, no notes, nothing....only me to deal with... Best regards and thanks, Thierry

[thierrypp]

a typical example, no *.h files /* ---------------------- */ /* structure_en_globale.c */ /* ---------------------- */ #include #include /* -- declaration des constantes -- */ #define TAILLE_NOM 20 #define TAILLE_PRENOM 2*TAILLE_NOM #define MAX_ETUDIANTS 50 struct etudiant { char nom[TAILLE_NOM] ; char prenom[TAILLE_PRENOM] ; int age ; } ; /* -- variables globales -- */ int nbeleves=0 ; struct etudiant tab_eleves[MAX_ETUDIANTS]; /* -- procedures et fonctions -- */ void saisie_eleves(); void affichage() ; struct etudiant recherche_eleve(char nom_recherche[]); /* ----------------------------------- */ main() { struct etudiant eleve ; char nom_eleve[TAILLE_NOM] ; int choix = -1 ; /* -- boucle d'affichage du menu -- */ while (choix != 0 ) { printf("\n"); printf(" -1- Saisie d'une liste d'Žlves \n"); printf(" -2- Recherche d'un Žlve \n"); printf(" -3- Affichage de la liste\n"); printf(" -0- FIN\n"); printf("\n"); printf("Choix:"); scanf("%d",&choix); /* -- selecteur : appel des procedures -- */ switch (choix) { case 1 : saisie_eleves(); break ; case 2 : printf("Entrez le nom de l'Žlve :"); scanf ("%s",nom_eleve); eleve=recherche_eleve(nom_eleve); if (! strcmp(eleve.nom,"NON_TROUVE")) { printf("Aucun %s trouvŽ\n",nom_eleve); } else { printf("Nom : %s\n",eleve.nom); printf("PrŽnom : %s\n",eleve.prenom); printf("Age : %d\n",eleve.age); } break ; case 3 : affichage(); break ; case 0 : printf("Au revoir \n"); break ; default: printf("Erreur de saisie\n"); break; } } } /* ----------------------------------- */ void saisie_eleves() { struct etudiant studtmp ; int termine ; termine = 0 ; /* -- boucle de saisie du tableau des eleves -- */ while (! termine) { printf("Entrez un nom (\"fin\" pour terminer):"); scanf("%s",studtmp.nom); termine=((strcmp(studtmp.nom,"fin"))==0) ; if (! termine) { printf("Entrez un prŽnom:"); scanf("%s",s

[Rage]

thierrypp wrote:

May I know how to work with c files on a visual C++ 6.0 IDE?

Two possibilities: 1. You want to keep the project as a c-project, then you need to change the calling convention in your project settings. 2. You do not care about it being c or c++, then simply rename your .c files .cpp and everything will be ok. Hope this helps ~RaGE();

[thierrypp]

thanks for the informations but in fact, the problem remains...... Maybe if someone knows about Lcc-win 32? Regards T.

[Shraddhan]

Thierry, I approached this in a methodical way. Follow me and you should be OK: In Visual C++ 6.0 create a new project. Choose Win 32 Console Application, select a simple application. Delete the lines: int main(int argc, char* argv[]) { return 0; } Copy the code in. I used one of the examples you supplied. Compile: get 5 errors, 1 warning. Looking at what the errors were, I deleted the following two lines which are clearly wrong: #include #include The other three errors are about printf, scanf, strcmp not being recognised. I guess that I need to include some files. I moved the cursor on to the word printf and hit the F1 key. Visual C++ 6.0 gave some information on how to use this function. It also said that it needed the include file . Same for scanf. For strcmp, Visual C++ 6.0 says that I need to include . So I added the next two lines. #include #include Now there is a warning: warning C4508: 'main' : function should return a value; 'void' return type assumed Being just a warning, I could have ignored this. But to do the job properly, as I have been told that main() should return a value, I changed the line main() to be: int main() and to return a value, I added the following line just before the end of the main() function: return 0; Et voila! It compiles. And runs. No problemo, as they say. (And by the way, the source file that Visual C++ created is indeed .CPP, not .C) Shraddhan

[Shraddhan]

Oops! The bit biter swallowed some of my text. Yhe files to be included are stdio.h and string.h I guess that because these names were included inside angle brackets they got chopped off. That is preumably the reason why they were missing from the code sample you supplied. Bon chance, Shraddhan