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   zunda (zundan@mastodon.zunda.ninja)'s status on Saturday, 23-Nov-2024 11:02:30 JST zunda

   • かき@GNUsocialJP

   現代のCで返り値に型のある関数でreturn;したらどうなるんだろう!!

   • Embed this notice
     zunda (zundan@mastodon.zunda.ninja)'s status on Saturday, 23-Nov-2024 11:03:04 JST zunda

     in reply to

     • かき@GNUsocialJP

     UBだ♪

     $ cat return.c
     #include <stdlib.h>
     #include <stdio.h>

     int function(void){
     return;
     }

     int main(void)
     {
     printf("%d\n", function());
     return 0;
     }
     $ gcc return.c && ./a.out && ./a.out && ./a.out
     return.c: In function ‘function’:
     return.c:5:3: warning: ‘return’ with no value, in function returning non-void
     5 | return;
     | ^~~~~~
     return.c:4:5: note: declared here
     4 | int function(void){
     | ^~~~~~~~
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