foo.cc: In function 'int main()':
foo.cc:10:26: error: 'd' was not declared in this scope
   cin>>a[i]>>b[i]>>c[i]>>d[i]>>e[i];
                          ^
foo.cc:10:32: error: 'e' was not declared in this scope
   cin>>a[i]>>b[i]>>c[i]>>d[i]>>e[i];
                                ^
foo.cc:33:37: error: 'd' was not declared in this scope
   int f1=(a[i]-'0')*10+b[i]-'0',f2=(d[i]-'0')*10+e[i]-'0';
                                     ^
foo.cc:33:50: error: 'e' was not declared in this scope
   int f1=(a[i]-'0')*10+b[i]-'0',f2=(d[i]-'0')*10+e[i]-'0';
                                                  ^

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