Compilare: user.cpp: In function ‘void citire()’: user.cpp:51:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<G[start].size(); i++) ^ user.cpp: In function ‘void Prim()’: user.cpp:73:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j<G[vfmin].size(); j++) ^ user.cpp: In function ‘void citire()’: user.cpp:37:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d", &n, &m); ^ user.cpp:41:41: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d %d", &x, &y, &cost); ^ user.cpp: In function ‘void Prim()’: user.cpp:72:15: warning: ‘vfmin’ may be used uninitialized in this function [-Wmaybe-uninitialized] sel[vfmin]=1; ^