@[Fudaoyuan0636](/user/625599) https://oi-wiki.org/lang/basic/
by S0CRiA @ 2022-03-29 21:22:57
# 回复：printf用法
```c++
printf("%.保留位数\n",要处理的数);
```
by Quenna @ 2022-05-01 08:45:53
@[Fudaoyuan0636](/user/625599) printf("%.保留位数\n",要处理的数);
by Jeremy811 @ 2022-09-26 13:42:26
@[Fudaoyuan0636](/user/625599)
**格式：**`printf("%.4（需要保留的位数）lf",变量);`
**常用变量：**
`%d`：`int`
`%lld`:`long long`
`%f`:`float`
`%lf`:`double`
`%c`:`char`
[详细信息](https://blog.csdn.net/qq_29874741/article/details/94626531)
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by BEST_CAT @ 2023-01-12 17:19:34