View Compilation Error

0_0_18308777_10468.cpp: In function 'int main()':
0_0_18308777_10468.cpp:68:17: error: 'c' was not declared in this scope
                 c[i][i]=ci[i][j]=cj[i][j]=cij[i][j]=0;
                 ^
0_0_18308777_10468.cpp:68:25: error: 'ci' was not declared in this scope
                 c[i][i]=ci[i][j]=cj[i][j]=cij[i][j]=0;
                         ^
0_0_18308777_10468.cpp:68:34: error: 'cj' was not declared in this scope
                 c[i][i]=ci[i][j]=cj[i][j]=cij[i][j]=0;
                                  ^
0_0_18308777_10468.cpp:68:43: error: 'cij' was not declared in this scope
                 c[i][i]=ci[i][j]=cj[i][j]=cij[i][j]=0;
                                           ^