32 lines
687 B
Python
32 lines
687 B
Python
'''
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【程序84】
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题目：一个偶数总能表示为两个素数之和。
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1.程序分析：
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2.程序源代码：
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此代码有问题，待修改
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'''
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import math
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if __name__ == '__main__':
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a = int(raw_input('input an odd number:\n'))
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d = 0
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c = 2
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for b in range(3,a / 2 + 1,2):
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m = 0
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for c in range(2,int(math.sqrt(b)) + 1):
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if b % c == 0 :
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m = c
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break
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if m > math.sqrt(b):
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d = a - b
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else:
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break
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for c in range(2,int(math.sqrt(d)) + 1):
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if d % c == 0:
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m = c
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break
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if m > math.sqrt(d):
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print '%d = %d + %d' % (a,b,d)
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