Compilare: user.cpp: In function ‘int main()’: user.cpp:30:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(t1 != t2) ^ user.cpp:20:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d\n",&n,&m); ^ user.cpp:25:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d %d",&q,&x,&y); ^