Compilare: user.cpp: In function ‘double dijkstra()’: user.cpp:72:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[curr.vertex].size();i++) { ^ user.cpp:56:9: warning: unused variable ‘j’ [-Wunused-variable] int i,j,z; ^ user.cpp:56:11: warning: unused variable ‘z’ [-Wunused-variable] int i,j,z; ^ user.cpp:82:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:143:55: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=1;j<=codes_count;j++) for(i=0;i<v[j].size();i++) v[j][i].w=rng.next(); ^ user.cpp:131:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cclj.in","r",stdin); ^ user.cpp:132:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cclj.out","w",stdout); ^ user.cpp:135:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &tests); ^ user.cpp:137:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &m); ^