View Compilation Error

0_0_25466570_4943.cpp: In function 'int main()':
0_0_25466570_4943.cpp:9:9: error: expected ';' before 'int'
         int k=7*n*sqrt(n);
         ^
0_0_25466570_4943.cpp:10:16: error: 'k' was not declared in this scope
         while (k--);
                ^