Sorting a structure

[gitimaya]

hi,
i have a crucial issue: I have to sort a array of structures basing on one of the element, however the problem here is i have to sort it based on strings in the feild. like for example we have a struct called:

struct arr { char a[10];
char b[10];
int a; } a

here a is the key. Say we have arr[10] (ten elements of struct types in array).
now I have a criteria to sort this array bassing on element a which can only stored by a global array. How to go for it. someone please help me.

regards,
Geet

[r035198x]

hi,
i have a crucial issue: I have to sort a array of structures basing on one of the element, however the problem here is i have to sort it based on strings in the feild. like for example we have a struct called:

struct arr { char a[10];
char b[10];
int a; } a

here a is the key. Say we have arr[10] (ten elements of struct types in array).
now I have a criteria to sort this array bassing on element a which can only stored by a global array. How to go for it. someone please help me.

regards,
Geet

Just decide on your sorting algorithm and write a sort function.
Forget that they are structs that you are sorting when you're writting it (think of them as ints if you want).
After you're sure your sort works, adapting it to suit structs, or any other type, should be very easy.

[weaknessforcats]

sort this array bassing on element a which can only stored by a global array

Nothing has to be stored as a global array. Most often global variables are used to avoid having to pass function arguments. This is bad practice.

However, as to your sort, if you ar eusing C you can use qsort. Just write a function that knows how to compare two of your struct variables and returns true if the first variable is less than the second variable. Pass the address of this function to qsort.

If you goe the hard way and write yourown sort, then have an argument to pass in the address of the comparator function, which you will still need to write.