Write a function called addtofirstfieldofstruct that adds a number to the first field in a struct. the inputs to the function addtofirstfieldofstruct are the struct name, structname, and the incrementing number, increment. the function should not rely on specific fields name. restrictions: dot notation should be used to create the struc. ex:

Wireless communications is likely to be viewed as an essential part of an enterprise network infrastructure when: select one: a. mobile communication is needed b. communication facilities must be installed at low initial cost c. communication must take place in a hostile or difficult terrain that makes wired communication difficult or impossible d. the same information must be broadcast to many locations

Idon understand these and need some ! ?

Write a program that prompts the user to input a string. the program then uses the function substr to remove all the vowels from the string. for example, if str = "there", then after removing all the vowels, str = "thr". after removing all the vowels, output the string. your program must contain a function to remove all the vowels and a function to determine whether a character is a vowel.