How do you round off decimal places in C++?

Question

I need help rounding off a float value to one decimal place. I know `setprecision(x)` and `cout << precision(x)`. Both of which work if I wanted to round the entire float, but I am only interested in rounding the decimals to the tenths place.

Accepted Answer

There's another solution which doesn't require casting to int:

```
#include <cmath>

y = floor(x * 10d) / 10d
```

How do you round off decimal places in C++?

Solution

Problem