foo.cc: In function 'int main()':
foo.cc:65:25: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
             if (nums[0] = 0)
foo.cc:64:17: warning: unused variable 'l' [-Wunused-variable]
             int l;
                 ^
foo.cc:19:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d", &nums[j]);
             ~~~~~^~~~~~~~~~~~~~~~

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