R:如何让str_count查找两个特定数字之间出现零的次数？

def count_zeros_between_numbers(str_count, num1, num2):
    str_count = str(str_count)
    count = 0
    counting = False
    
    for char in str_count:
        if char == str(num1):
            counting = True
        elif char == str(num2):
            counting = False
            break
        
        if counting and char == '0':
            count += 1
    
    return count

# 示例使用：
str_count = '1034050060909'
num1 = 3
num2 = 9
zeros_count = count_zeros_between_numbers(str_count, num1, num2)
print(f"The number of zeros between {num1} and {num2} is: {zeros_count}")