我试图使用struct对两个矩阵求和,但它不起作用。
如果可以优化此代码,请告诉我:D
编译:
g++ -O2 -Wall program.cpp -o program
输出:
在/usr/include/c++/4.8/iostream:39:0中包含的文件中, 来自Proy3.cpp:2: /usr/include/c++/4.8/ostream:548:5:注意:模板std :: basic_ostream& std :: operator<<(std :: basic_ostream&,const unsigned char *) operator<<(basic_ostream& __out,const unsigned char * __s) ^ /usr/include/c++/4.8/ostream:548:5:注意:模板参数扣除/替换失败: Proy3.cpp:51:30:注意:'std :: istream {aka std :: basic_istream}'不是从'std :: basic_ostream'派生的 cin<< &安培; M2.x [i] [j];
代码:
# include < cstdio >
# include < iostream >
typedef struct Matrix
{
int row, column;
int x[20][20];
};
Matrix M1,M2;
使用namespace std;
int main() {
cout << "Insert size rows: Mat[a]";
cin >> M1.row);
cout << "Insert size of columns Mat[a]";
cin >> M1.column;
cout << "Insert size of rows Mat[b]";
cin >> M2.row;
cout << "Insert size of columns Mat[b]";
cin >> M2.column;
int i, j;
// Matrix x
for(i = 0; i <= M1.row; i++)
{
for(j = 0; j <= M1.column; j++)
{
cout << "Insert number for matrix X : \n";
cin >> M1.x[i][j]
}
}
// Matrix y
for(i = 0; i <= M2.row; i++)
{
for(j = 0; j <= M2.column; j++)
{
cout << "Insert number for matrix Y : \n";
cin << M2.x[i][j];
}
}
// Matrix X + Matrix Y
for(i = 0; i <= M1.row; i++)
{
for(j = 0; j < M1.column; j++)
{
cout <<"The sum of " << M1.x[i][j] << " + " << M2.x[i][j] << " = " << M1.x[i][j] + M2.x[i][j] << endl;
}
}
return 0;
}
答案 0 :(得分:0)
for(i = 0; i <= M2.M1.row; i++)
{
for(j = 0; j <= M2.M1.column; j++)
{
cout << "Insert number for matrix Y : \n";
cin << &M2.M1.y[i][j];
}
}
您尝试访问的M2.M1.y
没有元素。
另外你为什么在M1
内声明M2
。你可能只有一个结构并有两个实例。像
struct matrix
{
int row,column;
int X[20][20];
};
struct matrix M1,M2;
现在您可以输入两个矩阵。
此外,您必须使用cin>>a
代替cin>>&a
。
cin << &M2.x[i][j];
也应该是
cin >> M2.x[i][j];
^^^^
答案 1 :(得分:0)
我认为cin陈述应该是cin&gt;&gt; &安培; M2.x [i] [j];而不是cin&lt;&lt; &安培; M2.x [i] [j];