數組的動态記憶體配置設定

 #include <stdlib.h>

int main(int argc, char *argv[])

{

    long int i, j, N = atoi(argv[1]);

    int *a = (int *)malloc(N*sizeof(int));

    if (a == NULL)

    {

        printf("Insufficient memory./n");

    }

..................

    return 0;

}