Compilare: user.cpp: In function ‘int main()’: user.cpp:83:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d %d",&n,&m); ^ user.cpp:85:20: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(tmp,4,in); ^ user.cpp:89:30: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(v[i],NMAX+3,in); ^ user.cpp:165:13: warning: ‘sum’ may be used uninitialized in this function [-Wmaybe-uninitialized] sum += 2; ^ user.cpp:164:13: warning: ‘coord’ may be used uninitialized in this function [-Wmaybe-uninitialized] coord ++; ^ user.cpp:148:17: warning: ‘r’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(r == nrmax) ^