Itanium® Architecture for Programmers: Understanding 64-Bit Processors and EPIC Principles

9.3. SCANTERM: Using C Standard I/O

We presented in Chapter 6 the simple SCANTEXT program to scan through a stored string, byte by byte, looking for space characters as separators between words. That program, like many of our other illustrations, had no provision for I/O outside of the debugger.

We will rework the SCANTEXT program to add input and output from the “terminal” (i.e., the keyboard and display), using external calls to standard C library functions (Table 9-1). The new SCANTERM program in Figure 9-3 displays a prompt with puts, obtains a line of input using gets, counts the number of words and the total number of characters, and then prints a summary line containing two embedded numeric fields in decimal radix using printf.

We encourage ...