Compilare: user.cpp: In function ‘int main()’: user.cpp:44:83: warning: operation on ‘vf’ may be undefined [-Wsequence-point] if(stiva[vf-1].y + 1 == stiva[vf].x) stiva[vf-1].y = stiva[vf--].y; ^ user.cpp:45:88: warning: operation on ‘vf’ may be undefined [-Wsequence-point] else if(stiva[vf].y + 1 == stiva[vf-1].x) stiva[vf-1].x = stiva[vf--].x; ^ user.cpp: In function ‘void Read(int&)’: user.cpp:21:47: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if(++poz==DIM) fread(buff,1,DIM,fin),poz=0; ^ user.cpp:25:51: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if(++poz==DIM) fread(buff,1,DIM,fin),poz=0; ^ user.cpp: In function ‘int main()’: user.cpp:33:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&N); ^ user.cpp:34:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&T); ^