【MATH6005-Introduction to Python and MATH6181-Python & Forecasting】

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TASK1

White a function, using the prototype provided, to make change for money from £0 to £5. The function should output the number of coins from each denomination used to make the change, i.e., £2, £1, 50p, 20p, 10p, 5p, 2p, 1p

Function prototype

def changeMarker ( value ):
	’’’
	function description
	’’’
	return two_pound , one_pound , p50 , p20 , p10 , p5 , p2 , p1

Function Behavior/atributes

• Your function must check if the value is within the range (0, 5). If not, the function must return −1 for all quantities of coins.
• Your function must give the least amount of coins for a value.

Examples of inputs and outputs

value = 6 # if the value is set equal to 6
output = changeMarker ( value )
print ( output )
# the outout should be output = (-1, -1, -1, -1, -1, -1, -1, -1)

output = changeMarker ( 2. 53 )
print ( output )
# the output should be output = (1, 0, 1, 0, 0, 0, 1, 1)

Answer

代码如下（示例）：

def changeMarker(value):
    '''
    function description 
    '''
    if value<=0 or value>=5:
        two_pound, one_pound, p50, p20, p10, p5, p2, p1 = -1, -1, -1, -1, -1, -1, -1, -1
    else:
        value = value*100
        t = [200,100,50,20,10,5,2,1]
        m = [0 for _ in range(len(t))]
        for i, money in enumerate(t):
            m[i] = int(value // money)
            value = round(value%money)
            two_pound, one_pound, p50, p20, p10, p5, p2, p1 = m
            
    
    return two_pound, one_pound, p50, p20, p10, p5, p2, p1

Test