动态分配内存

#include
     
      #include
      
       int compare_integers(void const *a,void const *b){    register int const *pa = a;    register int const *pb = b;    return *pa>*pb ? 1:*pa<*pb ? -1:0;}int main(){    int *array;    int n_value;    int i;    printf("How many values are there?\n");    if(scanf("%d",&n_value)!=1 || n_value<0)    {        printf("Illegal numbers of values.\n");        exit(EXIT_FAILURE);    }    array = (int *)malloc(n_value*sizeof(int));    if(NULL == array)    {        printf("Cant get memery for that many values.\n");        exit(EXIT_FAILURE);    }        for(i = 0;i