foo.cc: In function 'void loopAll(int, int)':
foo.cc:24:22: warning: comparison of integer expressions of different signedness: 'int' and 'long unsigned int' [-Wsign-compare]
   24 |         for(int j=0;j<sizeof(prime)/sizeof(int);j++) {
      |                     ~^~~~~~~~~~~~~~~~~~~~~~~~~~
foo.cc: In function 'int main()':
foo.cc:87:22: warning: comparison of integer expressions of different signedness: 'int' and 'long unsigned int' [-Wsign-compare]
   87 |         for(int j=0;j<sizeof(prime)/sizeof(int);j++) {
      |                     ~^~~~~~~~~~~~~~~~~~~~~~~~~~

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