Write a function strlen that takes one char str[] as an argument, and return the number of characters in the str[] array. (c++)

c++problem

Answer in C++ code please! (Duplicate Elimination with vector) Use a vector to solve the following problem. Read in 20 numbers, each of which is between 10 and 100, inclusive. As each number is read, validate it and store it in the vector only if it isn't a duplicate of a number already read. After reading all the values, display only the unique values that the user entered. Begin with an empty vector and use its push_back function to add each unique value to the vector.

How do you put a 2D array code into a function? (C++ only)

Complete the function below. You must not change the fuction signatures, names return types and parametersmust remain as given. Please the code must be in c+

in c++