This should do the job, in case the previous examples didn´t:
Code:
my.skill2 = (var)sys_malloc(100*sizeof(var)); // Create array
((var*)my.skill2)[5] = 6;
printf("((var*)my.skill2)[5] = %f", (double)((var*)my.skill2)[5]); // Test


Lite-C Tut. 1 Lite-C Tut. 2 Lite-C Tut. 3 (en)
Shader Tutorial (ger)

http://www.slindev.com