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printf behaviour in C


printf behaviour in C

By : Shannon Simpson
Date : November 21 2020, 07:01 PM
To fix this issue I am trying to understand what is the difference between the following: ,
How using the 'f' changes/influences the output?
code :
4.56700000000000017053025658242404460906982421875     // best
4.56699999999999928235183688229881227016448974609375  // next best double
4.566999912261962890625  // best
4.56700038909912109375   // next best float
printf("%f",4.56700000000000017053025658242404460906982421875);
printf("%f",4.566999912261962890625);
4.567000
45670000000.000000 // double
45669998592.000000 // float


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printf like behaviour?

printf like behaviour?


By : Araon pottor
Date : March 29 2020, 07:55 AM
Any of those help You need the vprintf function if you want to pass in a va_list pseudo-argument:
code :
return vprintf(fmt, args);
JNI system.out and printf behaviour

JNI system.out and printf behaviour


By : Batman
Date : March 29 2020, 07:55 AM
it should still fix some issue Yes. You will need to call flush.
In C, that is the fflush call -
code :
printf("Hello JNI\n");
fflush(stdout);
return 10;
System.out.println("before");
System.out.flush();
C: weird printf behaviour

C: weird printf behaviour


By : boomer
Date : March 29 2020, 07:55 AM
Hope this helps Ints, floats and pointers are not necessarily the same size on the stack. As %d expects an int, it just takes as many bytes as there are in an int from the stack, so you won't necessessarily print what you expect to print if the expected sizes of the items in your format string don't match the sizes of the arguments you provide to printf.
Behaviour of stdout and printf

Behaviour of stdout and printf


By : Andrew Arendt
Date : March 29 2020, 07:55 AM
Any of those help Writing printf("hai\n"); instead will cause, due to the newline character, the output buffer to be flushed, so you'll see the output before entering the infinite loop. There are other ways of flushing the output buffer, but appending the newline character is particularly simple.
Technically the behaviour of a tight loop like while(1); is undefined in C, but that is unlikely to be the cause of your problem.
Strange printf behaviour?

Strange printf behaviour?


By : Sylvia MBemba
Date : March 29 2020, 07:55 AM
To fix the issue you can do C does not define in which order function call arguments get evaluated. You are in for trouble there ;).
Update:
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