Compilare: user.cpp: In function ‘int calc(int)’: user.cpp:38:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<pos.size()&&pos[i]<msk;i++) ^ user.cpp:30:13: warning: unused variable ‘s1’ [-Wunused-variable] int val,s1=0,i,j,msk1,msk2,M,ip,jp,btcnt; ^ user.cpp:30:20: warning: unused variable ‘j’ [-Wunused-variable] int val,s1=0,i,j,msk1,msk2,M,ip,jp,btcnt; ^ user.cpp:30:22: warning: unused variable ‘msk1’ [-Wunused-variable] int val,s1=0,i,j,msk1,msk2,M,ip,jp,btcnt; ^ user.cpp:30:27: warning: unused variable ‘msk2’ [-Wunused-variable] int val,s1=0,i,j,msk1,msk2,M,ip,jp,btcnt; ^ user.cpp:30:32: warning: unused variable ‘M’ [-Wunused-variable] int val,s1=0,i,j,msk1,msk2,M,ip,jp,btcnt; ^ user.cpp:30:34: warning: unused variable ‘ip’ [-Wunused-variable] int val,s1=0,i,j,msk1,msk2,M,ip,jp,btcnt; ^ user.cpp:30:37: warning: unused variable ‘jp’ [-Wunused-variable] int val,s1=0,i,j,msk1,msk2,M,ip,jp,btcnt; ^ user.cpp:30:40: warning: unused variable ‘btcnt’ [-Wunused-variable] int val,s1=0,i,j,msk1,msk2,M,ip,jp,btcnt; ^