I'm trying to write a code for an integer n
a) n is less than 500
b) n is positive
c) n is divisible by 3
but the result for divisibility by 3 is not showing when I run it.
Here is my code.
#include <cstdlib>
#include <iostream>
using namespace std;
int main(int argc, char** argv)
{
int n,x,y;
cout <<"input the value of n"<<endl;
cin >>n;
x=500-n;
if(x>0)
cout<<"the value of n is less than 500 "<<endl;
if(n>0)
cout<<"the value of n is positive"<<endl;
y=n%3;
if(y=0)
cout<<"the value of n is divisible by 3"<<endl;
return 0;
}
if(y=0) // y=0 assigns the value 0 to y
cout<<"the value of n is divisible by 3"<<endl;
should be
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if(y==0) // y==0 tests if y is equal to 0
cout<<"the value of n is divisible by 3"<<endl;
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#include <iostream>
int main()
{
int n ;
std::cout << "input the value of n: " ;
std::cin >> n;
if( n < 500 ) std::cout << "the value of n is less than 500\n" ;
if( n > 0 ) std::cout << "the value of n is positive\n" ;
if( n%3 == 0 ) std::cout << "the value of n is divisible by 3\n" ;
}
It's ok as long as you do not write a using namespace directive (at global scope) in a header file or before an #include
Ideally, it is best when the using namespace directive is at function local scope.
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#include <iostream>
int main()
{
usingnamespace std ; // this won't affect the meaning of the code
// in other functions that we may use later
int n ;
cout << "input the value of n: " ; // within this function, we can still use
cin >> n; // unqualified names for entities from namespace std
if( n < 500 ) cout << "the value of n is less than 500\n" ;
if( n > 0 ) cout << "the value of n is positive\n" ;
if( n%3 == 0 ) cout << "the value of n is divisible by 3\n" ;
}