0_0_39792453_9148.cpp: In function 'int main()':
0_0_39792453_9148.cpp:8:15: error: 'cin' was not declared in this scope
8 | while(cin>>a){
| ^~~
0_0_39792453_9148.cpp:4:1: note: 'std::cin' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
3 | #include <cmath>
+++ |+#include <iostream>
4 | using namespace std ;
0_0_39792453_9148.cpp:9:33: error: 'cout' was not declared in this scope
9 | if(a<101&&a>89) cout<<"A";
| ^~~~
0_0_39792453_9148.cpp:9:33: note: 'std::cout' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
0_0_39792453_9148.cpp:10:32: error: 'cout' was not declared in this scope
10 | if(a<90&&a>79) cout<<"B";
| ^~~~
0_0_39792453_9148.cpp:10:32: note: 'std::cout' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
0_0_39792453_9148.cpp:11:32: error: 'cout' was not declared in this scope
11 | if(a<80&&a>69) cout<<"C";
| ^~~~
0_0_39792453_9148.cpp:11:32: note: 'std::cout' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
0_0_39792453_9148.cpp:12:32: error: 'cout' was not declared in this scope
12 | if(a<70&&a>59) cout<<"D";
| ^~~~
0_0_39792453_9148.cpp:12:32: note: 'std::cout' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
0_0_39792453_9148.cpp:13:31: error: 'cout' was not declared in this scope
13 | if(a<60&&a>0) cout<<"E";
| ^~~~
0_0_39792453_9148.cpp:13:31: note: 'std::cout' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
0_0_39792453_9148.cpp:14:32: error: 'cout' was not declared in this scope
14 | if(a<0||a>100) cout<<"Score is error!";
| ^~~~
0_0_39792453_9148.cpp:14:32: note: 'std::cout' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
|
