Eroare de compilare: user.cpp:7:99: error: ‘int y1 [8001]’ redeclared as different kind of symbol int dx[]={0,-1,0,1,0},dy[]={0,0,1,0,-1},nr,q[2][4500],a[102][4],i,j,x[802],y[802],x1[8001],y1[8001],n,l,p,viz[801][801],nr1; ^ In file included from /usr/include/features.h:357:0, from /usr/include/i386-linux-gnu/c++/4.8/bits/os_defines.h:39, from /usr/include/i386-linux-gnu/c++/4.8/bits/c++config.h:420, from /usr/include/c++/4.8/iostream:38, from user.cpp:1: /usr/include/i386-linux-gnu/bits/mathcalls.h:243:1: error: previous declaration of ‘double y1(double)’ __MATHCALL (y1,, (_Mdouble_)); ^ user.cpp: In function ‘int main()’: user.cpp:46:9: warning: pointer to a function used in arithmetic [-Wpointer-arith] y1[0]=0; ^ user.cpp:46:10: error: assignment of function ‘double y1(double)’ y1[0]=0; ^ user.cpp:46:10: error: cannot convert ‘int’ to ‘double(double)throw ()’ in assignment user.cpp:55:20: warning: pointer to a function used in arithmetic [-Wpointer-arith] y1[y[i]]=y1[y[i-1]]+2; ^ user.cpp:55:31: warning: pointer to a function used in arithmetic [-Wpointer-arith] y1[y[i]]=y1[y[i-1]]+2; ^ user.cpp:55:33: warning: pointer to a function used in arithmetic [-Wpointer-arith] y1[y[i]]=y1[y[i-1]]+2; ^ user.cpp:55:21: error: assignment of read-only location ‘*(y1 + ((sizetype)y[i]))’ y1[y[i]]=y1[y[i-1]]+2; ^ user.cpp:55:21: error: cannot convert ‘double (*)(double)throw ()’ to ‘double(double)throw ()’ in assignment user.cpp:58:24: warning: pointer to a function used in arithmetic [-Wpointer-arith] y1[y[i]]=y1[y[i-1]]+4; ^ user.cpp:58:35: warning: pointer to a function used in arithmetic [-Wpointer-arith] y1[y[i]]=y1[y[i-1]]+4; ^ user.cpp:58:37: warning: pointer to a function used in arithmetic [-Wpointer-arith] y1[y[i]]=y1[y[i-1]]+4; ^ user.cpp:58:25: error: assignment of read-only location ‘*(y1 + ((sizetype)y[i]))’ y1[y[i]]=y1[y[i-1]]+4; ^ user.cpp:58:25: error: cannot convert ‘double (*)(double)throw ()’ to ‘double(double)throw ()’ in assignment user.cpp:64:29: warning: pointer to a function used in arithmetic [-Wpointer-arith] for(l=y1[a[i][1]];l<=y1[a[i][3]];l++) ^ user.cpp:64:29: error: invalid conversion from ‘double (*)(double)throw ()’ to ‘int’ [-fpermissive] user.cpp:64:44: warning: pointer to a function used in arithmetic [-Wpointer-arith]