======================================= Exercise 7.4 - private version of scanf ======================================= Question ======== Write a private version of scanf analogous to minprintf from the previous section. .. literalinclude:: cprogs/ex_7.4.c :language: c :tab-width: 4 Explanation =========== The Headers `#include ` This header provides functionality for functions with variable arguments (variadic functions) It defines va_list, va_start, va_arg, and va_end macros which are used to handle variable arguments Essential for implementing functions like scanf/printf that can take varying numbers of arguments `#include ` This is the standard input/output header Provides functions like printf, sscanf, putchar used in the program Necessary for basic input/output operations This program implements a functionality similar to scanf, by taking a variable number of args and prints them to output. `#include ` for the malloc macro. The key components are :: va_list ap; // Declares a variable to hold the argument list va_start(ap, fmt); // Initializes ap to point to first unnamed argument va_arg(ap, type); // Returns next argument of specified type va_end(ap); // Cleanup of argument list Visualize ========= .. raw:: html