flyingfish89 opened a new pull request, #7677:
URL: https://github.com/apache/incubator-nuttx/pull/7677
## Summary
such as code: double value = +0x1.000000000000080000000000p-600;
printf("Hello, World!! %.7g:f64\n", value);
expected output : Hello, World!! 2.40992e-181:f64
but real output : Hello, World!! 2.40992e-B1:f64
the reason: we want printf "18", but the flag of character is 'B'
and 'B' is '0'+18,so printf 'B';
Related issue: https://github.com/apache/incubator-nuttx/issues/7620
## Impact
float printf
## Testing
esp32c3 with test code
```c
double value = +0x1.000000000000080000000000p-600;
printf("Hello, World!! %.7g:f64\n", value);
```
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