View Compilation Error

0_0_32268970_26593.cpp: In function 'int main()':
0_0_32268970_26593.cpp:20:17: error: 'a' was not declared in this scope
                 a[fenpei]+=1;
                 ^
0_0_32268970_26593.cpp:35:21: error: 'a' was not declared in this scope
                     a[i]++;
                     ^
0_0_32268970_26593.cpp:38:20: error: 'a' was not declared in this scope
                 if(a[tem] != a[tem+1])
                    ^
0_0_32268970_26593.cpp:43:32: error: 'a' was not declared in this scope
         printf("%d %d\n",sum++,a[n]);
                                ^