View Compilation Error

0_0_33572440_19373.cpp: In function 'int main()':
0_0_33572440_19373.cpp:14:34: error: 'tot' was not declared in this scope
    scanf("%d%d",&A[i],&B[i]),C[++tot]=A[i],C[++tot]=B[i];
                                  ^
0_0_33572440_19373.cpp:15:16: error: 'tot' was not declared in this scope
   sort(C+1,C+1+tot);
                ^