Using c++ Write a function that accepts an integer n and returns -1 if n is less than zero and the sum of all the integers between 0 and n (inclusive) if n is greater than or equal to zero.

Write a function named contains-double in Scheme that takes a list as input and returns true if an item every appears twice in a row. You may assume the list is flat (i.e., no nested lists).

5. use c code to Write a stringSearch function that gets two strings one called needle and the other called haystack. It then searches in the Haystack for the needle. If it finds it, it returns the index of where the needle starts in the haystack. If the needle cannot be found, it should return -1 Prototype: int stringSearch(char needle[], char haystack) Example1: Haystack: “This is just an example” Needle: “just” Result: 8 Example2: Haystack: “This is just an example” Needle: “This” Result: 0 Example3: Haystack: “This is just an example” Needle: “this” Result: -1 Hint: all the answer need to include an output and use c code to answer

*You need to have at least one user define function *Language: C programming  Write a C Program to print half pyramid using numbers shown below. This example is for height 6. Ask user for a height and depending on user input, draw the half pyramid.   Input: Key in the height: 6 Output: 1 1 2 1 2 3 1 2 3 4 1 2 3 4 5 1 2 3 4 5 6

use c code to Develop a function that gets two same length strings as parameters and reports the number of characters that they have different. For example, if the two strings are   Str1: “Hello world! Happy Friday”Str2: “Hello Johny! happy friday”   The function should return: Your strings are different in 7 places However, if the strings are exactly equal, it should just say Your strings are the same   If the strings are not of the same length, the code should just say: The two strings are not of the same length!   Hint: 1.compare the two strings character by character and report the differences 2.answer must have and show the output