Compilare: main.cpp: In function 'void citire()': main.cpp:19:37: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&x); ^ main.cpp: In function 'int main()': main.cpp:86:25: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&op); ^ main.cpp:87:29: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&n,&m); ^ main.cpp:97:38: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&a[i][j]); ^ main.cpp:98:29: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&q,&k); ^ main.cpp:100:79: 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",&v[i].xi,&v[i].yi,&v[i].xf,&v[i].yf,&v[i].val); ^ main.cpp: In function 'void cb(int, int)': main.cpp:81:17: warning: 'last' may be used uninitialized in this function [-Wmaybe-uninitialized] fout<<last<<'\n'; ^~~~