foo.c: In function 'main':
foo.c:12:26: error: expected ';' before 'printf'
   12 |         sum=j*3600+k*60+g
      |                          ^
      |                          ;
   13 |     printf("%d\n",sum);
      |     ~~~~~~                
foo.c:7:13: warning: variable 'sum' set but not used [-Wunused-but-set-variable]
    7 |         int sum;
      |             ^~~

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