using various data types in c language

hi friends,



i am working in hp-unix with c compiler.

actually i want to learn the use of various data types in c language,

specifically signed , unsigned .


but when i declare the of either signed or unsigned using
either the keywords
uint or sint ,
the compiler throws up lot of errors.


i am a beginer to embedded systems, so i need to master
the use of various data types and the problems ass with it.

i would be very greatful if some one could tell me the decleration
for signed and unsigned variables.



thanks
sanju

Integer Types In C and C++