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  1. #include<stdio.h>
  2.  
  3. int main() {
  4. printf("%d\n", ( { int n; scanf("%d", &n); n*n; } ));
  5. return 0;
  6.  
  7. }
Compilation error #stdin compilation error #stdout 0s 0KB
stdin
Standard input is empty
compilation info
prog.c: In function ‘main’:
prog.c:4:24: error: ISO C forbids braced-groups within expressions [-Werror=edantic]
cc1: all warnings being treated as errors
stdout
Standard output is empty