Compilare: main.cpp: In function 'int main()': main.cpp:30:15: warning: unused variable 'pt' [-Wunused-variable] long long pt,val; ^~ main.cpp:31:47: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d%d%d%d",&n,&a0,&b0,&p,&q); ^ main.cpp:74:24: warning: 'sfa' may be used uninitialized in this function [-Wmaybe-uninitialized] process (sfa,n); ^