foo.cc: In function 'int main()':
foo.cc:12:18: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare]
   12 |     for(int i=0;i<strlen(a);i++)
      |                 ~^~~~~~~~~~
foo.cc:12:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   12 |     for(int i=0;i<strlen(a);i++)
      |     ^~~
foo.cc:17:2: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   17 |  cout<<ou<<","<<""<<ji<<endl;
      |  ^~~~

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