Compilare: user.cpp: In function ‘int main()’: user.cpp:13:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%lld",&n); ^ user.cpp:15:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%lld",&v[i]); ^ user.cpp:52:19: warning: ‘a2’ may be used uninitialized in this function [-Wmaybe-uninitialized] v[c1+1]=a2; ^ user.cpp:51:17: warning: ‘a1’ may be used uninitialized in this function [-Wmaybe-uninitialized] v[c1]=a1; ^ user.cpp:54:19: warning: ‘b2’ may be used uninitialized in this function [-Wmaybe-uninitialized] v[c2+1]=b2; ^ user.cpp:53:17: warning: ‘b1’ may be used uninitialized in this function [-Wmaybe-uninitialized] v[c2]=b1; ^ user.cpp:57:13: warning: ‘c3’ may be used uninitialized in this function [-Wmaybe-uninitialized] v[c3+2]=0; ^