I need help converting this Python program into C++. If someone could assist that would be greatly appreciated.

def main():

print("The following program should enter integer numbers until an negative number.")

print("The output is the smallest number input as well as the number of numbers.")

n = 0

num = int(input("Enter a number: "))

while num < 0:

num = int(input("Invalid number. Must be non-negative. Enter a new number: "))

smallest = num

while num >= 0:

n += 1

if num < smallest:

smallest = num

num = int(input("Enter a number: "))

print("Of", n, "numbers read, the smallest number is", smallest)

if __name__ == "__main__":

main()