Eroare de compilare: user.cpp:7:20: error: ‘int y0’ redeclared as different kind of symbol int n,m,len,a,b,x0,y0; ^ In file included from /usr/include/features.h:357:0, from /usr/include/stdio.h:28, from user.cpp:1: /usr/include/i386-linux-gnu/bits/mathcalls.h:242:1: error: previous declaration of ‘double y0(double)’ __MATHCALL (y0,, (_Mdouble_)); ^ user.cpp: In function ‘int main()’: user.cpp:85:27: error: assignment of function ‘double y0(double)’ x0 = i,y0 = j; ^ user.cpp:85:27: error: cannot convert ‘int’ to ‘double(double)throw ()’ in assignment user.cpp:98:17: error: invalid conversion from ‘double (*)(double)throw ()’ to ‘int’ [-fpermissive] dfs(x0,y0,0); ^ user.cpp:12:6: error: initializing argument 2 of ‘void dfs(int, int, int)’ [-fpermissive] void dfs(int i,int j,int k) ^ user.cpp:71:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cobai.in","r",stdin); ^ user.cpp:72:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cobai.out","w",stdout); ^ user.cpp:74:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&n,&m); ^ user.cpp:78:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",ar[i] + 1); ^ user.cpp:95:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",s); ^