#include
void main()
{
int n,s,a=2,i,t=0;
scanf("%d",&n);
for(i=1;ivoid main(){ int n,s=0,a=2,i,t=0; scanf("%d",&n); for(i=1;ivoid main(){int n,i,a,s,t;a=2;s=0;t=0; /*s要付初值*/scanf("%d",&n);for(i=1;i#define a 2int main(){ int n;int i,j=0;int sum=0;printf("请输入n的值：");scanf("%d",&n);for(i=0;i<=n;i++){j=j*10+a;sum=sum+j;}printf("sum=%d\n"
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