2.자연수의합
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#include <iostream>
using namespace std;
int main() {
int a, b, i, sum =0;
cin>>a>>b;
for(i=a; i<b; i++){
cout << i<<" + ";
sum = sum +i;
}
cout<<i<<" = ";
cout<<sum+i;
return 0;
}
Cpp
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