<分区>
我试图编写一个简单的代码来尝试求解矩阵，但遇到了一个错误。很明显，我只是在做一些愚蠢的事情，所以我希望你能来救援!每当我运行代码并输入值时，它都会返回 'x' was not declared in this scope。有什么想法吗？
#include <iostream>
using namespace std;
int main() {
// Row 1
cout << "Please input the first row, first column (R1:C1)" << endl;
int R1C1;
cin >> R1C1;
cout << "Please input the first row, second column (R1:C2)" << endl;
int R1C2;
cin >> R1C2;
cout << "Please input the first row, third column (R1:C3)" << endl;
int R1C3;
cin >> R1C3;
cout << "Please input the first row, fourth column (R1:C4)" << endl;
int R1C4;
cin >> R1C4;
// Row 2
cout << "Please input the second row, first column (R2:C1)" << endl;
int R2C1;
cin >> R2C1;
cout << "Please input the second row, second column (R2:C2)" << endl;
int R2C2;
cin >> R2C2;
cout << "Please input the second row, third column (R2:C3)" << endl;
int R2C3;
cin >> R2C3;
cout << "Please input the second row, fourth column (R2:C4)" << endl;
int R2C4;
cin >> R2C4;
// Row 3
cout << "Please input the third row, first column (R3:C1)" << endl;
int R3C1;
cin >> R3C1;
cout << "Please input the third row, second column (R3:C2)" << endl;
int R3C2;
cin >> R3C2;
cout << "Please input the third row, third column (R3:C3)" << endl;
int R3C3;
cin >> R3C3;
cout << "Please input the third row, fourth column (R2:C4)" << endl;
int R3C4;
cin >> R3C4;
if (R1C1 > 1)
int x = R1C1 * (1/R1C1);
cout << x;
return 0;
}