Using the stack in MIPS

Exercise 1

Write a program that prompts the user for a string. Read the string into a buffer (use a large-enough .space directive for the buffer). Using the stack, reverse the string in the buffer. Print the resulting string.

To reverse the string, push a NUL character (\0) onto the stack. Then set a pointer to the base of the string buffer and scan the string until you find the NUL at the end, pushing each character as you go. After you read the terminating NUL, reset your pointer to the base of the string buffer, then pop characters from the stack and copy them into the buffer until you pop the NUL byte.

Remember, you only work with words on the stack, not bytes.