59.cpp

c++课程习题集的源代码

#include<iostream.h> 
 int main()                                                  
{
 int i,j,a[4][4],s;
 cout<<"请输入数组元素的值："<<endl;
 for(i=0;i<4;i++)
  for(j=0;j<4;j++)
   cin>>a[i][j];
 for(i=0,s=0;i<4;i++)
 {
  s+=a[i][i];
  s+=a[i][3-i];
 }
 cout<<"s="<<s<<endl;
 return(0);
}