c++ 算法
//分配内存 a = new int*[n]; for(i = 0; i < n; i++) {
a[i] = new int[n]; }
cout<<"正在运算，请等待……"<<endl; //给n阶方阵的元素赋值 evaluate(a,n);
cout<<"运算结束！"<<endl; for(i = 0; i < n; i++) {
delete []a[i]; }
delete []a; } }while(1); return; }
/* 5、求一个3x3矩阵对角线元素之和。*/ #include
int dia(int a[][3]); void main() {
int i,j,sum,a[3][3]={2,3,5,6,2,3,1,9,0}; cout<<"a= "; for(i=0;i<3;i++) {