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# include <bits/stdc++.h>
using namespace std ;
typedef long long LL ;
const int N = 110 ;
int n = 3 ;
//两个n*n的矩阵
/*
z[][N]:结果数组
C++中，如果传递的函数参数是数组，则理解为按地址传递，
在函数内的修改动作将直接修改数组内容，调用者可以直接
使用修改后的内容。
不论是几维的多维数组，只有第一维的长度不用指定，其它都要指定。
黄海理解一下：
因为多维数组在内存中是连续存的，
*/
void add ( LL z [ ] [ N ] , LL x [ ] [ N ] , LL y [ ] [ N ] ) {
for ( int i = 1 ; i < = n ; i + + )
for ( int j = 1 ; j < = n ; j + + )
z [ i ] [ j ] = x [ i ] [ j ] + y [ i ] [ j ] ;
}
void dec ( LL z [ ] [ N ] , LL x [ ] [ N ] , LL y [ ] [ N ] ) {
for ( int i = 1 ; i < = n ; i + + )
for ( int j = 1 ; j < = n ; j + + )
z [ i ] [ j ] = x [ i ] [ j ] - y [ i ] [ j ] ;
}
/*
测试用例
1 2 3
1 2 3
1 2 3
4 5 6
4 5 6
4 5 6
输出结果:
5 7 9
5 7 9
5 7 9
*/
LL x [ N ] [ N ] , y [ N ] [ N ] , z [ N ] [ N ] ;
int main ( ) {
for ( int i = 1 ; i < = n ; i + + )
for ( int j = 1 ; j < = n ; j + + )
cin > > x [ i ] [ j ] ;
for ( int i = 1 ; i < = n ; i + + )
for ( int j = 1 ; j < = n ; j + + )
cin > > y [ i ] [ j ] ;
add ( z , x , y ) ;
for ( int i = 1 ; i < = n ; i + + ) {
for ( int j = 1 ; j < = n ; j + + )
cout < < z [ i ] [ j ] < < " " ;
cout < < endl ;
}
dec ( z , x , y ) ;
for ( int i = 1 ; i < = n ; i + + ) {
for ( int j = 1 ; j < = n ; j + + )
cout < < z [ i ] [ j ] < < " " ;
cout < < endl ;
}
return 0 ;
}
