change pointer passed by value

by

You would need to use a pointer to a pointer:

foo(struct node **n)

To change what n points to, you do:

*n = t;

More Related Contents:

  1. How do I modify a pointer that has been passed into a function in C?
  2. Pointers program
  3. Are there differences between pointers to object stored on stack and heap? [closed]
  4. With arrays, why is it the case that a[5] == 5[a]?
  5. Length of array in function argument
  6. What is the difference between char * const and const char *?
  7. In C, are arrays pointers or used as pointers?
  8. Are all data pointers the same size in one platform for all data types? [duplicate]
  9. Dynamic memory access only works inside function
  10. Why can’t I convert ‘char**’ to a ‘const char* const*’ in C?
  11. size_t vs. uintptr_t
  12. C function pointer casting to void pointer
  13. Difference between char *str=”STRING” and char str[] = “STRING”?
  14. How to increment a pointer address and pointer’s value?
  15. How to printf a memory address in C
  16. What is the difference between far pointers and near pointers?
  17. Why can I change a local const variable through pointer casts but not a global one in C?
  18. Pointer Arithmetic: ++*ptr or *ptr++?
  19. Segmentation Fault when writing to a string [duplicate]
  20. Why is a point-to-volatile pointer, like “volatile int * p”, useful?
  21. Is the compiler allowed to recycle freed pointer variables?
  22. Can a pointer (address) ever be negative?
  23. In C, why can’t an integer value be assigned to an int* the same way a string value can be assigned to a char*?
  24. Mis-aligned pointers on x86
  25. How to find the size of an array (from a pointer pointing to the first element array)?
  26. Can I treat a struct like an array?
  27. Printing pointers in C
  28. lvalue required as increment operand
  29. pointer default value .?
  30. C pointer notation compared to array notation: When passing to function

Leave a Comment