搞了n次都是格式错误？？

#include"iostream"
using namespace std;
int main()
{
    int i,num,j,m=0;
    char c;   
    while(scanf("%c%d",&c,&num)!=EOF)
    {
        if(c=='@')exit(0);
        if(m++)cout<<endl;
        for(i=1;i<num;i++)
        {
            for(j=1;j<=num-i;j++)    //循环结束后j=num-i+1
                cout<<" ";   
            cout<<c;
            for(j+=1;j<=num+i-2;j++)
                cout<<" ";
            if(i!=1)
                cout<<c;
            cout<<endl;
        }
        for(j=1;j<=2*i-1;j++)
            cout<<c;
        cout<<endl;
    }
    return 0;
}