$ echo 'main;' > t.c; gcc t.c && ./a.outt.c:1:1: warning: data definition has no type or storage class 1 | main; | ^~~~t.c:1:1: warning: type defaults to ‘int’ in declaration of ‘main’ [-Wimplicit-int]Segmentation fault (core dumped)
すごおいhttps://qiita.com/yasuo-ozu/items/ddc5d3e8e4a97eaa470c
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