foo.cc: In function 'int main()':
foo.cc:39:9: warning: unused variable 'len1' [-Wunused-variable]
39 | int len1 = Mul(n1, m1, num1);
| ^~~~
foo.cc:43:9: warning: unused variable 'len2' [-Wunused-variable]
43 | int len2 = Mul(n2, m2, num2);
| ^~~~
foo.cc: In function 'int Mul(int, int, int*)':
foo.cc:32:12: warning: 'len' may be used uninitialized [-Wmaybe-uninitialized]
32 | return len;
| ^~~
foo.cc:23:9: note: 'len' was declared here
23 | int len;
| ^~~
foo.cc:7:13: warning: 'len' may be used uninitialized [-Wmaybe-uninitialized]
7 | int len;
| ^~~
foo.cc: In function 'int main()':
foo.cc:44:9: warning: 'len' may be used uninitialized [-Wmaybe-uninitialized]
44 | int len;
| ^~~
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