Where is the mistake... Because this doesn't work can you help me.

Question

#include <iostream>
using namespace std;

int main() {
int num,c;
cin >> num;
cin >> c;
int a =(num/c)*100 ;
if(a>100){cout <<"lower num. please";}
if(a>90 && a<100){cout <<"5";}
if(a>75 && a<90){cout <<"4";}
if(a>65 && a<75){cout <<"3";}
if(a<65 && a>0){cout <<"not passed ";}
cout << a <<num <<c ;
return 0;
}

Answer 1

if you are running this in the code playground you need to give all inputs at once seperated by new line:

40
62
"Submit"

Answer 2

missing } to close main function
unless you just missed that when pasting here xD

Answer 3

how do you know that

Answer 4

i mean... that i miss } when i was pasting it

Answer 5

Take out the please unless you want to cout the please

Answer 6

Your if statements miss the numbers 100, 90, 75, and 65. One line says
a > 90 and the one below says a < 90. Where does 90 go? Nowhere.
You should include 90 in one of the groups. Maybe a>= 90 or a <= 90 (NOT BOTH). Do the same for 100, 75, and 65.