Eroare de compilare: user.cpp:7:21: error: ‘int y1’ redeclared as different kind of symbol int m,n,i,k,j,x1,x2,y1,y2,x[NMAX][NMAX]; ^ In file included from /usr/include/features.h:346:0, from /usr/local/include/c++/4.8.0/i686-pc-linux-gnu/bits/os_defines.h:39, from /usr/local/include/c++/4.8.0/i686-pc-linux-gnu/bits/c++config.h:420, from /usr/local/include/c++/4.8.0/cstdio:41, from user.cpp:1: /usr/include/bits/mathcalls.h:242:1: error: previous declaration of ‘double y1(double)’ __MATHCALL (y1,, (_Mdouble_)); ^ user.cpp: In function ‘int main()’: user.cpp:18:37: warning: format ‘%d’ expects argument of type ‘int*’, but argument 3 has type ‘double (*)(double)throw ()’ [-Wformat=] scanf("%d %d %d %d",&x1,&y1,&x2,&y2); ^ user.cpp:19:10: error: invalid types ‘long long int [102][double(double)throw ()]’ for array subscript a[x1][y1]=1; ^ user.cpp:39:23: error: ISO C++ forbids comparison between pointer and integer [-fpermissive] if ((x1==x2) && (y1==y2)) nr++; ^