In C programming, how would you convert a string to a number without using atoi?

C++ CODE ONLY: Write a program that takes as input five numbers and outputs the mean (average) and standard deviation of the numbers. If the numbers are X₁, X2, X3, X4, and x5, then the mean is X = (X1 + X2 + X3 + x4 + x5 ) / 5 and the standard deviation is: (x₁−x)²+ (x₂-x)²+ (x¸¯x)²+(x¸−x)²+(x¸¯x)² S = 5 Your program must contain at least the following functions: 1. a function that calculates and returns the mean; and, 2. a function that calculates the print standard deviation. Input 1.5 integers Output Enter five numbers: 2 3 9 10 11 The mean is 7.00. The standard deviation is 3.742. Enter five numbers: 7 7 8 9 11 The mean is 8.40. The standard deviation is 1.497.

Create a case detector program in the C++ language in which the user enters an alphabet and the program should print "Uppercase" if the character is an uppercase alphabet, else print "Lowercase" if the character is a lowercase alphabet. The program should also display an error message if the character entered is not an alphabet.

Drawa structured flowchart , C++,  write pseudocode that describes the process of guessing a number between 1 and 100. After each guess, the player is told that the guess is too high or too low. The process continues until the player guesses the correct number. Pick a number and have a fellow student try to guess it following your instructions.