Eroare de compilare: user.cpp:6:21: error: ‘int j1’ redeclared as different kind of symbol int k,p,u,m,v,i1,i2,j1,j2,i,j,n; ^ 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:239:1: error: previous declaration of ‘double j1(double)’ __MATHCALL (j1,, (_Mdouble_)); ^ user.cpp: In function ‘int main()’: user.cpp:34:15: error: assignment of function ‘double j1(double)’ for(j1=1;j1<n-1;j1++) ^ user.cpp:34:15: error: cannot convert ‘int’ to ‘double(double)throw ()’ in assignment user.cpp:34:23: error: ISO C++ forbids comparison between pointer and integer [-fpermissive] for(j1=1;j1<n-1;j1++) ^ user.cpp:34:27: error: ISO C++ forbids incrementing a pointer of type ‘double (*)(double)throw ()’ [-fpermissive] for(j1=1;j1<n-1;j1++) ^ user.cpp:34:27: error: lvalue required as increment operand user.cpp:36:29: error: invalid conversion from ‘double (*)(double)throw ()’ to ‘int’ [-fpermissive] v=suma(1,1,i1,j1); ^ user.cpp:9:5: error: initializing argument 4 of ‘int suma(int, int, int, int)’ [-fpermissive] int suma(int x1,int y1,int x2,int y2) ^ user.cpp:53:40: error: invalid conversion from ‘double (*)(double)throw ()’ to ‘int’ [-fpermissive] v=suma(i1+1,1,i2,j1); ^ user.cpp:9:5: error: initializing argument 4 of ‘int suma(int, int, int, int)’ [-fpermissive] int suma(int x1,int y1,int x2,int y2) ^ user.cpp:64:35: warning: pointer to a function used in arithmetic [-Wpointer-arith] for(j2=j1+1;j2<n;j2++) ^ user.cpp:64:34: error: invalid conversion from ‘double (*)(double)throw ()’ to ‘int’ [-fpermissive] for(j2=j1+1;j2<n;j2++) ^ user.cpp:66:48: error: invalid conversion from ‘double (*)(double)throw ()’ to ‘int’ [-fpermissive] z[1]=suma(1,1,i1,j1); ^ user.cpp:9:5: error: initializing argument 4 of ‘int suma(int, int, int, int)’ [-fpermissive] int suma(int x1,int y1,int x2,int y2) ^ user.cpp:67:51: error: invalid conversion from ‘double (*)(double)throw ()’ to ‘int’ [-fpermissive] z[2]=suma(i1+1,1,i2,j1); ^