Kindly requesting a little help in C prog

hi friends and experts ,
I am a budding engg.. worling in an embedding company... i got a problem in my programming.. in Linux O.S
i have an int.variable as i/p ex: int a and i get an i/p of 10 digits(3456789034)
when i made a =a/10; the output value is coming rather than expect so i intialize
a as long int , double but all the value looks to be some different ..
so i kindly ask any one please help me to the problem...