ProgrammingThis forum is for all programming questions.
The question does not have to be directly related to Linux and any language is fair game.
Notices
Welcome to LinuxQuestions.org, a friendly and active Linux Community.
You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!
Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.
If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here.
Having a problem logging in? Please visit this page to clear all LQ-related cookies.
Get a virtual cloud desktop with the Linux distro that you want in less than five minutes with Shells! With over 10 pre-installed distros to choose from, the worry-free installation life is here! Whether you are a digital nomad or just looking for flexibility, Shells can put your Linux machine on the device that you want to use.
Exclusive for LQ members, get up to 45% off per month. Click here for more info.
query=(char *)malloc(100*sizeof(char));
printf("String meta to malloc %s \n",query);
Hi i have some problems with the dynamic allocation of char...
These two lines give the a string that is not empty
String meta to malloc \uffff\uffff\u0777
P.s The string returns me instead of an empty string some square boxes.... that cannot be print here
malloc() does not initialize the memory block that it returns. The contents of the memory will contain whatever was last placed in it by any previously run program. You should initialize the memory block to zeros before actually doing anything useful with it. You can use any number of functions such as memset(), or bzero() to perform this initialization.
As stated above, all malloc does is ask the system to set aside a block of n bytes for use by that program, and then give the address back to the program. It is up to you to put something in that memory.
LinuxQuestions.org is looking for people interested in writing
Editorials, Articles, Reviews, and more. If you'd like to contribute
content, let us know.