Beair.GQ

[CODE=C] while(true) { printf("it's good idea,and all of those can help us to learn c program well!\n"); }[/CODE]

[code=c] void* ptr = buf_ptr[20]; //----------->error [/code] what i want to say is "buf_ptr[20]" is not a pointer,it's the value of the 20th in buf_ptr

first of all,u should add seed of random data void srand( unsigned int seed ); use current time as seed!

use "pointer" to define ur function like this void PrintMatrix(int *matrix); and it will work good!

U can try to use function like "fflush(stdin)",when u call it ,it can also clear the input buffer

// fill in the array is not shown here qsort(array, NumStrings, sizeof(array[0]), compare); here,"sizeof(array[0])" is 20bytes; // fill in the array is not shown here qsort(array, NumStrings, sizeof(array[0]), compare); but here,"sizeof(arry[0])" arry[0] is a pointer,so it's mean 4bytes