Compilare: user.cpp: In function ‘int main()’: user.cpp:22:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (nr<0 && semn==0 && -nr>sol){ ^ user.cpp:30:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if (nr>0 && semn==1 && nr>=sol){ ^ user.cpp:34:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if (nr>0 && semn==1 && nr<sol) ^ user.cpp:36:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if (nr<0 && semn==0 && -nr<=sol) ^ user.cpp:13:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&n); ^ user.cpp:15:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&v[i]); ^ user.cpp:17:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&w[i]); ^