View Compilation Error

0_0_33988872_9984.cpp: In function 'int main()':
0_0_33988872_9984.cpp:6:22: error: 'tot' was not declared in this scope
  while(cin>>a>>b)c[++tot]=a+b;
                      ^
0_0_33988872_9984.cpp:7:16: error: 'tot' was not declared in this scope
  for(int i=1;i<tot;++i)printf("%d\n",c[i]);
                ^
0_0_33988872_9984.cpp:8:16: error: 'tot' was not declared in this scope
  printf("%d",c[tot]);
                ^