Compilare: user.cpp: In function ‘int afla(int)’: user.cpp:12:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(a<w) ^ user.cpp: In function ‘int main()’: user.cpp:39:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&t); ^ user.cpp:43:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&x,&y); ^