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作业

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Gnayizgnaw

#1 Created at ... [Delete] [Delete and Lock User]

s1 = 72

s2 = 85

r = (s2-s1) / s1*100

print('小明的成绩提升了 %.1f %%' %r)

渣成沙

#2 Created at ... [Delete] [Delete and Lock User]

%d就是普通的输出了

% 2d是将数字按宽度为2,采用右对齐方式输出,若数据位数不到2位,则左边补空格。
% 02d,和% 2d差不多,只不过左边补0
%.2d 输出整形时最少输出2位,如不够前面以0占位。如输出2时变成02。200时只输出200;输出浮点型时(%.2f)小数点后强制2位输出

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