Using C++

Use a validation loop to prompt for and get from the user the number of terms to approximate PI to that is at least 1. Use the Leibniz formula

Use a for statement to calculate the approximation. Within the loop, use condition i % 2 == 0 to determine whether the loop iteration is even or odd. Format all real numbers to ten decimal places. Continue to prompt the user for terms until they enter a sentinel value of 99. Loop the program five times with increasing values for the number of terms.