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RT-Thread English
rt_kprintf ("Float = %f",5/2);
发布于 2015-10-14 13:37:33 浏览:8174
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Hi every body in function rt_kprintf("Float = %f",5/2). I don't receive result is 2.5 , only receive value is Float=%f, I don't understand why? Please help me, Thanks!
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bernard
2015-10-14
这家伙很懒,什么也没写!
[s:170] aozima reply you: Please use sprintf for float then use rt_kprintf for printf.
tranchonly2015
2015-10-14
这家伙很懒,什么也没写!
in rt-thread-2.0.0_rc of me have one paragraph code in finsh_error.c ``` static const char * finsh_error_string_table[] = { "No error", "Invalid token", "Expect a type", "Unknown type", "Variable exist", "Expect a operater", "Memory full", "Unknown operator", "Unknown node", "Expect a character", "Unexpect end", "Unknown token", "Float not supported", "Unknown symbol", "Null node" }; ``` **Float not supported** => so I don't use Float data type, I've followed your instructions but unsuccessful . I want use Float data type. Can you help me solve these problems ? Or for me one examples ? Or Any idea? Thanks and Regards,
aozima
2015-10-14
调网络不抓包,调I2C等时序不上逻辑分析仪,就像电工不用万用表!多用整理的好的文字,比截图更省流量,还能在整理过程中思考。
finsh not support float, don't use float in finsh command! but you can use float data type in you C code.
tranchonly2015
2015-10-14
这家伙很懒,什么也没写!
I use float data type in code c but I use function rt_kprintf display result is fail ex: float a=3.234; rt_kprintf("result = %f",a); => it display **result = %f** if true it display **result = 3.234** please help me thanks!
bernard
2015-10-14
这家伙很懒,什么也没写!
rt_kprintf does NOT support float type data.
tranchonly2015
2015-10-14
这家伙很懒,什么也没写!
Hi bernard if I buy package support rt-thread, then I use float type data ? please let me know Thanks!
bernard
2015-10-14
这家伙很懒,什么也没写!
Why do you always say that? You can use libc API, such as sprintf to print a float data type to a buffer (as string), then use rt_kprintf to print to the UART.
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