printf保留两位小数

printf函数可以通过使用格式化字符串来保留小数位数。具体到保留两位小数，可以使用格式化字符串"%.2f"。在printf函数中，这个格式化字符串的意思是输出一个浮点数并保留两位小数。例如，如果要输出变量a并保留两位小数，可以使用printf函数如下：printf("%.2f", a)。这样就能够将变量a输出并保留两位小数。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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