Compilare: user.cpp:44:7: warning: ISO C++ forbids declaration of ‘main’ with no type [-Wreturn-type] main(){ ^ user.cpp: In function ‘int main()’: user.cpp:48:18: warning: unused variable ‘maxi’ [-Wunused-variable] int nrmsel,i,maxi,mini,j; ^ user.cpp:48:23: warning: unused variable ‘mini’ [-Wunused-variable] int nrmsel,i,maxi,mini,j; ^ user.cpp:48:28: warning: unused variable ‘j’ [-Wunused-variable] int nrmsel,i,maxi,mini,j; ^ user.cpp: In function ‘void citire()’: user.cpp:14:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:16:53: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&g[i].n1,&g[i].n2,&g[i].cost); ^ user.cpp: In function ‘int main()’: user.cpp:45:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("kruskal.in","r",stdin); ^ user.cpp:46:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("kruskal.out","w",stdout); ^