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C, 27 25

main(){printf("%50f",0);}

Thanks @Titus for knocking off 2 bytes


And for my non-competing 16 byte solution in C, go here: https://codegolf.stackexchange.com/a/111330/16513

^I say non-competing because the error code could possibly depend on your compiler, Also note I'm using GCC in that solution. Also I'm not certain if it breaks rule 1 or not, I think it probably does so I went ahead and labeled it non-competing