[ad_1] The starting asterisk indicates that the data is to be read from the stream but ignored (i.e. it is not stored in the location pointed by an argument). Reference: http://www.cplusplus.com/reference/cstdio/scanf/ So the data would not be saved in the variable. 1 [ad_2] solved What does %*c do when getting input from stdin? [closed]
[ad_1] %x format specifier experts the argument to be of type unsigned int. In your case, printf(“%x\n”,(const uint8_t)0x0D); printf(“%x\n”,0x0D); arguments will be promoted (default promotion rule) to match the type, but in case of printf(“%x\n”,(const uint8_t *)0x0D); //supplying a pointer printf(“%x\n”,(uint8_t *)0x0D); //supplying a pointer You’ll invoke undefined behavior, as per C11, chapter ยง7.21.6.1 […] … Read more
[ad_1] You are calling function expecting float* with a pointer to int. In C++ it is an error and your code does not compile. In C you will most likely get a warning and undefined behaviour anyway. [ad_2] solved Why does my function print ‘0’?
[ad_1] This is enough I suppose for explaining whatever you have shown. And the behavior you see can be anything given that it is undefined. From standard The fprintf function writes output to the stream pointed to by stream, under control of the string pointed to by format that specifies how subsequent arguments are converted … Read more