Hi everyone,
I need help with the C++ program. I need to find a way to write this:
compute the product of a*(a+1)*(a+2)*...*(b)
Narue 5,707
What have you tried? It looks like a fairly simple sequence that would be translated into an equally simple loop.
i tried:
if (a<b)
{
for (int a<=b; a++)
{
result=result*a;
cout <<result<<endl;
}
}
Narue 5,707
Yea, that's not even a complete program, much less a correct one. This actually works:
#include <iostream>
using namespace std;
int main()
{
int a = 1;
int b = 5;
int result = 1;
if (a<b)
{
for (; a<=b; a++)
{
result=result*a;
cout <<result<<endl;
}
}
}Note that a for loop has three clauses: initialization, which happens when the loop first begins and never happens again; conditional, which drives the loop and occurs at each iteration; increment, which happens at the end of each iteration. These clauses are always separated by a semicolon, even if the clause is empty. And all of the clauses are optional.
yeah i wrote the whole program but with
int a;
int b;
int result;
without putting values, but it didnt work, i dont know why.
anyway thank you.
Narue 5,707
>without putting values, but it didnt work, i dont know why.
The initial value for a local variable will be random unless you specify one.
