Compilare: user.cpp: In function ‘void Dijkstra()’: user.cpp:46:13: warning: unused variable ‘t’ [-Wunused-variable] int i,j,t,x,y; ^ user.cpp: In function ‘int main()’: user.cpp:80:15: warning: unused variable ‘j’ [-Wunused-variable] int i,x,y,j,z; ^ user.cpp: In function ‘void read(int&)’: user.cpp:32:38: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer,1,DIM,stdin); ^ user.cpp:40:38: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer,1,DIM,stdin); ^ user.cpp: In function ‘int main()’: user.cpp:76:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("retea.in","r",stdin); ^