大神帮找找错!

大神帮找找错!!十万火急!!
#include<iostream>
using namespace std;
template<class T>
struct Term
{
int row,col;
T value;
};


template<class T>
class SparseMatrix
{
public:
  SparseMatrix(int maxTerms=10);
~SparseMatrix(){delete []a;};
void Input();
void Output();
private:
int rows,cols;
int terms;
Term<T> *a;
int MaxTerms;
};


template<class T>
SparseMatrix<T>::SparseMatrix(int maxTerms)
{
if(maxTerms<1)cout<<"error!";
MaxTerms = maxTerms;
a = new Term<T>[MaxTerms];
terms=rows=cols=0;
};


template<class T>
void SparseMatrix<T>::Output()
{
cout<<"rows="<<rows<<" "<<"columns="<<cols<<endl;
cout<<"nonzero terms = "<<terms<<endl;
for(int i=0;i<terms;i++)
cout<<"a("<<a[i].row<<','<<a[i].col<<")="<<a[i].value<<endl;
}


template<class T>
void SparseMatrix<T>::Input()
{
int r,c,v;
cout<<"Enter number of rows,columns,and terms"<<endl;
getchar();
cin>>rows;
getchar();
cin>>cols;
getchar();
cin>>terms;
getchar();
if(terms>MaxTerms)cout<<"error!";
cout<<"Enter row,column,and value of term"<<endl;
int i=0;
for(int j=0;j<terms;j++){
getchar();
cin>>r;
getchar();
cin>>c;
getchar();
cin>>v;
getchar();
a[i].row=r;
a[i].col=c;
a[i].value=v;
i++;

}

}


int main()
{
SparseMatrix<int> s1;
s1.Input();
s1.Output();
  system("pause");
return 0;
}





运行的时候是这样的:
Enter number of rows,columns,and terms
(2,2,1)
Enter row,column,and value of term
(1,1,1)
rows=2 columns=2
nonzero terms=1
a(-858993460,-858993460)=-858993460



最后为什么是这样呢????求解答!!!!!


[解决办法]
把getchar全部去掉试试
[解决办法]
有2个getchar()调用是多余的.