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这个代码可以练习你的约分能力

import random as r

while 1:
    p=[2, 3, 5, 7, 11, 13,15]
    a=r.choice(p)
    b=r.choice(p)
    c=r.randint(1,12)
    aws= ("%d/%d"%(a,b))
    if r.random()<0.2:
        b=r.choice(p)
        d=r.randint(1,3)
        a=b*d
        aws=str(d)
    if a==b:aws="1"
    print("%d\n——\n%d\n="%(a*c,b*c),end="")
    ipt=input()
    if (ipt == aws):
        print("    right!!really is %s!"%(aws))
    else:
        print("    is %s"%(aws))