Question

Programming in a sense is easy. But bugs are something which always makes more trouble. Can anyone help me with good debugging tricks and softwares in c?

Answer 1

The following are popular debugging tools.

• Valgrind
• Purify
• Duma

Some very simple Tricks/Suggestions

-> Always check that nowhere in your code you have dereferenced a wild/dangling pointer

Example 1)

int main()
{
     int *p;
     *p=10; //Undefined Behaviour (crash on most implementations)
}

Example 2)

int main()
{

     int *p=malloc(sizeof(int));
     //do something with p

     free p;
     printf("%d", *p); ////Undefined Behaviour (crash on most implementations)
}

-> Always initialize variables before using

 int main()
  {

    int k;

    for(int i= k;i<10;++i)
              ^^
            Ouch
      printf("%d",i");
  }