View Compilation Error

0_0_33573123_10032.cpp: In function 'int main()':
0_0_33573123_10032.cpp:6:31: error: 'scanf_s' was not declared in this scope
     while(scanf_s("%d%d",&m,&n)!=EOF)
                               ^
0_0_33573123_10032.cpp:36:29: error: 'i' was not declared in this scope
         printf("%.2f\n", tx[i]);
                             ^