Eroare de compilare: user.cpp:4:142: error: ‘int j1’ redeclared as different kind of symbol int n,tx,ty,s1x,s1y,s2x,s2y,r1x,r1y,r2x,r2y,k,x,y,li,ci,ln,cn,in,sf,dl[]={0,-1,0,1,0},dc[]={0,0,1,0,-1},min11,min12,min21,min22,x1,x2;int i1,j1,Lmax = 0, L,i,j; ^ 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/cstdio:41, from user.cpp:1: /usr/include/i386-linux-gnu/bits/mathcalls.h:240:1: error: previous declaration of ‘double j1(double)’ __MATHCALL (j1,, (_Mdouble_)); ^ user.cpp: In function ‘int main()’: user.cpp:18:50: error: assignment of function ‘double j1(double)’ {for (j = 1; j <= n; j++)if (v[i][j]){j1 = j;while (v[i][j]==-3) j++;L = j - j1;if ( L > Lmax ) Lmax = L;} ^ user.cpp:18:50: error: cannot convert ‘int’ to ‘double(double)throw ()’ in assignment user.cpp:18:86: error: invalid operands of types ‘int’ and ‘double(double)throw ()’ to binary ‘operator-’ {for (j = 1; j <= n; j++)if (v[i][j]){j1 = j;while (v[i][j]==-3) j++;L = j - j1;if ( L > Lmax ) Lmax = L;} ^ user.cpp:12:28: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] {freopen("ai.in","r",stdin); ^ user.cpp:13:30: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ai.out","w",stdout); ^ user.cpp:14:102: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n%d %d %d %d %d %d %d %d %d %d\n%d",&n,&tx,&ty,&s1x,&s1y,&s2x,&s2y,&r1x,&r1y,&r2x,&r2y,&k); ^ user.cpp:16:41: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(i=1;i<=k;i++) {scanf("%d %d",&x,&y);v[x][y]=-3;} ^