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- (Numerical) Heron’s formula for the area, A, of a triangle with sides of length a, b, and c is A=s(sa)(sb)(sc) where s=(a+b+c)2 Write, test, and execute a function that accepts the values of a, b, and c as parameters from a calling function, and then calculates the values of sand[s(sa)(sb)(sc)]. If this quantity is positive, the function calculates A. If the quantity is negative, a, b, and c do not form a triangle, and the function should set A=1. The value of A should be returned by the function.Mark the following statements as true or false: a. To use a predefined function in a program, you need to know only the name of the function and how to use it. (1) b. A value-returning function returns only one value. (2, 3) c. Parameters allow you to use different values each time the function is called. (2, 7, 9) d. When a return statement executes in a user-defined function, the function immediately exits. (3, 4) e. A value-returning function returns only integer values. (4) f. A variable name cannot be passed to a value parameter. (3, 6) g. If a C++ function does not use parameters, parentheses around the empty parameter list are still required. (2, 3, 6) h. In C + + , the names of the corresponding formal and actual parameters must be the same. (3, 4, 6) i. A function that changes the value of a reference parameter also changes the value of the actual parameter. (7) j. Whenever the value of a reference parameter changes, the value of the actual parameter changes. (7) k. In C++, function definitions can be nested; that is, the definition of one function can be enclosed in the body of another function. (9) l. Using global variables in a program is a better programming style than using local variables, because extra variables can be avoided. (10) m. In a program, global constants are as dangerous as global variables. (10) n. The memory for a static variable remains allocated between function calls. (11)(Practice) For the following function headers, determine the number, type, and order (sequence) of values that should be passed to the function when it’s called and the data type of the value the function returns: a. int factorial(int n) b. double volts(int res, double induct, double cap) c. double power(int type, double induct, double cap) d. char flag(char type, float current, float time) e. int total(float amount, float rate) f. float roi(int a, int b, char c, char d, float e, float f) g. void getVal(int item, int iter, char decflag, char delim)
- Write the definition of a function that takes as input two decimal numbers and returns first number to the power of the second number plus second number to the power of the first number. (4)Why do you need to include function prototypes in a program that contains user-defined functions? (5)16. A function should display a welcome message to output it x is 1, else the function should display a farewell message. What should be the function's parameters and return value? A.Parameters: none Return value: none B.Parameters: X Return value: X C.Parameters: X Return value: none D.Parameters: none Return value: X
- 5. Write a function that returns the factorial of the number sent to it as a parameter. The parameter and the number returned will be of type double. 6. Write to it a function named fnk, which returns a variable of type double (using the Math.Sin function to use a radian value as the parameter of this function). x '+ x * sin (x) + 5Which statement below is true about a function: may have no parameters must always have a return statement must have at least one parameter its arguments always appear within bracketsLocal variables are known only to the function in which they are declared. Local variables are invisible outside the function in which they are declared. Whether True or False 11. It is possible for any function to return numerous values. Any function type may return multiple values. That's true, right?
- c++ question Write the definition for a value-returning function named ticketRate that has 1 parameter named category (a character) and returns the cost of a ticket (a floating-point). Your function should return 12.95 i f the category is 'A', 25.00 if the category is 'B' and return 0.0 otherwise.Write a function that takes three integers namely a, b, and c as parameters. The function shouldreturn the minimum difference between any two of those. (Example: a:5 b:3 c:9 function returns 2)Complete the function definition; that is, write the function's body. The code (function) will convert any fuel efficiency measured in mpg to the equivalent metric fuel consumption.
