foo.cc: In function 'int diffSet(int*, int, int*, int, int*)':
foo.cc:80:1: warning: no return statement in function returning non-void [-Wreturn-type]
80 | }
| ^
foo.cc: In function 'int symmDiffSet(int*, int, int*, int, int*)':
foo.cc:84:1: warning: no return statement in function returning non-void [-Wreturn-type]
84 | }
| ^
foo.cc: In function 'int main()':
foo.cc:120:12: warning: unused variable 'N' [-Wunused-variable]
120 | int const N=100;
| ^
foo.cc:121:15: warning: unused variable 'i' [-Wunused-variable]
121 | int n1,n2,n3,i;
| ^
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