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  1. main(){
  2. printf("Hello world\n");
  3. }
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
cc1: warnings being treated as errors
prog.c:1: error: return type defaults to ‘int’
prog.c: In function ‘main’:
prog.c:2: error: implicit declaration of function ‘printf’
prog.c:2: error: incompatible implicit declaration of built-in function ‘printf’
stdout
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Standard output is empty
https://ideone.com/lQukv
language:
C99 (gcc 8.3)
created:
14 years ago
visibility:
public

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