Thank you for your answers. I will read it more precisely but if the solution is to make the heap size bigger (I don't have tested yet), I don't know the limit I can take and moreover I wouldn't understand why fprintf of 2 int concatenated works whereas fprintf of one double doesn't? It needs less heap size ? I am not a specialist, I am a newbie so it may be a stupid logic, but I believed that heap size was linked whith the quantity of use of fprintf and co and not linked whith the typedef of arguments of what I wanted to fprintf, is it false ?
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