View Compilation Error

0_0_18493086_26353.cpp: In function 'int main()':
0_0_18493086_26353.cpp:45:9: error: 'i' was not declared in this scope
    for (i=1;i<=n;i++)  
         ^
0_0_18493086_26353.cpp:47:18: error: 'j' was not declared in this scope
             for (j=1;j<=n;j++)  
                  ^