函数指针作为qsort函数的参数

Question

at the qsort function in c there is a functin pointer to the compare function, which actually sorts the data of the array given.

so inside that function i see:

if ( *(MyType*)a <  *(MyType*)b ) return -1;

Well i understand a will casted to MyType* but what about the star after that on the very left? what is it doing?

Well, i guess this just dereference the pointer a?

thx.

/me

Answer 1

Well i understand a will casted to MyType* but what about the star after that on the very left? what is it doing?

So you know a is a pointer and pointer holds some valid memory location the value stored in that memory location is fetched by using the * operator which is called Dereferencing a pointer