Thread: Character stack ADT program

how can I write a program, using ADT that process a text strings,

Code:

void push(char ch); // pushes the character ch onto the stack;

char pop(); // pops and returns the top character;

int isEmpty(); // returns 1 if the stack is empty, 0 otherwise;

int reverseSentence(char str[]); // main function;

ie, if

Code:

str

is "ABC D2EF. GHI3J. KLM", then after calling the function

Code:

str

becomes "FED CBA. JIHG. MLK". The function should also return 3, indicating that there are 3 sentences.

Can someone spent a little time to help on my question? thk a lot.