i have got multiple .c files, and i wish to use the same variable throughout the files. "i" the variable, is used as a counter of members in the array. how do i delclare or initialise this variable so that i can use it in all of the .c files? when i delcare the varibale in each file i get erros saying that it has allready been declared in the other files, and, wheni dont declare it, i get errors messages tellgn me i need to declare it. any ideas people? cheers.