从一累加到10，但是却运行不了，谁能帮忙写个正确的？

Question

从一累加到10
#include<stdio.h>
#include<iostream>
using namespace std;
main()
{
int i=0,j,sum=0;
do
{
sum=i+1;
i=i+1;
}while(i=!9);
/* printf("%d",sum);*/
cout<<sum;
}

Answer 1

#include<stdio.h>#include<iostream>using namespace std;void main(){int i=0,sum=0;do{i=i+1;sum += i;}while(i!=9);printf("%d\n",sum);cout<<sum;}不是=!而是!=等于

Answer 2

#include<stdio.h>#include<iostream>using namespace std;void main(){int i,sum=0;for(i=1;i<=10;i++)sum+=i;}