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並前往https://www.quora.com/How-do-I-round-off-a-float-to-2-decimal-points-in-C-like-3-01943-to-3-02

How to round off a float to 2 decimal points in C, like 3.01943 ...

the compiler automatically takes care of rounding off the no. up to the given decimal point.Another e.g.. float a=3.995654;. printf(“%.2f”,a);. output=4.00;.

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