Compilare: user.cpp: In function ‘void compute(long int*, long int*, long int*, long int*, long int, long int*)’: user.cpp:269:12: warning: unused variable ‘p’ [-Wunused-variable] long i,j,k,p; ^ user.cpp: In function ‘void readdata()’: user.cpp:37:26: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(filein,"r",stdin); ^ user.cpp:38:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld %ld %ld",&dx,&dy,&n); ^ user.cpp:41:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld %ld",&xsx[i],&ysx[i]); ^ user.cpp: In function ‘void outputdata()’: user.cpp:333:28: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(fileout,"w",stdout); ^ user.cpp: In function ‘long int locate(long int*, long int)’: user.cpp:192:8: warning: ‘poz’ may be used uninitialized in this function [-Wmaybe-uninitialized] return poz; ^ user.cpp: In function ‘void compute(long int*, long int*, long int*, long int*, long int, long int*)’: user.cpp:317:32: warning: ‘poz’ may be used uninitialized in this function [-Wmaybe-uninitialized] k=addtotree(poz[k],k,narb,+1); ^ user.cpp:312:20: warning: ‘poz’ may be used uninitialized in this function [-Wmaybe-uninitialized] addtotree(poz[k],k,narb,-1); ^ user.cpp:293:32: warning: ‘poz’ may be used uninitialized in this function [-Wmaybe-uninitialized] k=addtotree(poz[k],k,narb,+1); ^ user.cpp:288:20: warning: ‘poz’ may be used uninitialized in this function [-Wmaybe-uninitialized] addtotree(poz[k],k,narb,-1); ^