Compilare: user.cpp: In function ‘int main()’: user.cpp:23:36: warning: variable ‘L’ set but not used [-Wunused-but-set-variable] int n ,A ,B ,nr ,temp1 ,temp2 ,L ,R; ^ user.cpp:21:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "dunarea.in" , "r" , stdin ); ^ user.cpp:22:44: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "dunarea.out" , "w" , stdout ); ^ user.cpp:25:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d%d%d" ,&A ,&B ,&n ); ^ user.cpp:28:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d%d" ,&temp1 ,&temp2 ); ^