View Compilation Error

0_0_39693108_25515.cpp: In function 'int main()':
0_0_39693108_25515.cpp:11:22: error: 'i' was not declared in this scope
   11 |         while(cin>>a[i]+1>>     ){
      |                      ^
0_0_39693108_25515.cpp:11:33: error: expected primary-expression before ')' token
   11 |         while(cin>>a[i]+1>>     ){
      |                                 ^
0_0_39693108_25515.cpp:27:44: error: expected primary-expression before ')' token
   27 |                         for(int i=0;i<=7;++)
      |                                            ^
0_0_39693108_25515.cpp:29:25: error: 'v' was not declared in this scope
   29 |                         v.x=k.x+tx[i];
      |                         ^