Compilare: user.cpp: In function ‘void bfs(int)’: user.cpp:44:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < vertices[start_node].size(); i++) ^ user.cpp:33:16: warning: unused variable ‘curr’ [-Wunused-variable] int dist = 1, curr=0; ^ user.cpp: In function ‘void read()’: user.cpp:21:51: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(iFile, "%d %d %d", &nodes, &edges, &nodeS); ^ user.cpp:25:48: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(iFile, "%d %d", &source, &destination); ^