Compilare: user.cpp: In function ‘void Dijkstra()’: user.cpp:96:18: warning: variable ‘x’ set but not used [-Wunused-but-set-variable] int x,cost; ^ user.cpp:96:20: warning: variable ‘cost’ set but not used [-Wunused-but-set-variable] int x,cost; ^ user.cpp: In function ‘int main()’: user.cpp:116:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d %d %d",&n,&m,&k); ^ user.cpp:121:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d ",&x); ^ user.cpp:129:41: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d %d %d ",&x,&y,&cost); ^