Cannot find the error in this code that multiplies matricies - c++11

Question

#include <iostream>
#include <vector>
using namespace std;
int main() {
int matrix1_rows;
int matrix1_columns;
int matrix2_columns;
vector<vector<int>> matrix1;
vector<vector<int>> matrix2;
vector<vector<int>> output_matrix;
int current_input;
cout << "Please specify the total row of your first matrix:" << endl;
cin >> matrix1_rows;
cout << "Please specify the total column of your first matrix:" << endl;
cin >> matrix1_columns;
for (int i = 0; i < matrix1_rows; i++) {
vector<int> row;
for (int j = 0; j < matrix1_columns; i++) {
cout << "Please specify the element of " << i << " row " << j << " col:" << endl;
cin >> current_input;
row.push_back(current_input);
}
matrix1.push_back(row);
}
cout << "Please specify the total column of your second matrix:" << endl;
cin >> matrix2_columns;
for (int i = 0; i < matrix1_columns; i++) {
vector<int> row;
for (int j = 0; j < matrix2_columns; j++) {
cout << "Please specify the element of " << i << " row " << j << " col:" << endl;
cin >> current_input;
row.push_back(current_input);
}
matrix2.push_back(row);
}
for (int i = 0; i < matrix1.size(); i++) {
vector<int> current_row;
for (int j = 0; j < matrix2[0].size(); j++) {
int current_entry = 0;
for (int k = 0; k < matrix1[0].size(); k++) {
current_entry += matrix1[i][k]*matrix2[k][j];
}
current_row.push_back(current_entry);
}
output_matrix.push_back(current_row);
}
cout << "The input matrix A is:" << endl;
for (int i = 0; i < matrix1.size(); i++) {
for (int j = 0; j < matrix1[i].size(); j++) {
cout << " " << matrix1[i][j];
}
cout << endl;
}
cout << "The input matrix B is:" << endl;
for (int i = 0; i < matrix2.size(); i++) {
for (int j = 0; j < matrix2[i].size(); j++) {
cout << " " << matrix2[i][j];
}
cout << endl;
}
cout << "The final matrix is:" << endl;
for (int i = 0; i < output_matrix.size(); i++) {
for (int j = 0; j < output_matrix.size(); j++) {
cout << " " << output_matrix[i][j];
}
cout << endl;
}
}
The output allows me to put an infinite number of values for a row and won't allow for input into the columns, I have checked many times but I must be missing something stupid.
I think it may be due to an issue with the current_entry or in my for loops a bit later on but I can't be sure. I have tried to adjust both of them but I haven't gotten anything to work
the output should look like this
Please specify the total row of your first matrix:
2
Please specify the total column of your first matrix:
2
Please specify the element of 0 row 0 col:
10
Please specify the element of 0 row 1 col:
-12
Please specify the element of 1 row 0 col:
55
Please specify the element of 1 row 1 col:
74
Please specify the total row of your second matrix:
2
Please specify the total column of your second matrix:
2
Please specify the element of 0 row 0 col:
-1
Please specify the element of 0 row 1 col:
0
Please specify the element of 1 row 0 col:
10
However, it looks like this:
Please specify the total row of your first matrix:
2
Please specify the total column of your first matrix:
2
Please specify the element of 0 row 0 col:
2
Please specify the element of 1 row 0 col:
12
Please specify the element of 2 row 0 col:
23
Please specify the element of 3 row 0 col:
23
Please specify the element of 4 row 0 col:
2
Please specify the element of 5 row 0 col:
24
Please specify the element of 6 row 0 col:
24
Please specify the element of 7 row 0 col:

Answer 1

As your output shows, you are not incrementing the right counter variable.
Instead of
for (int j = 0; j < matrix1_columns; i++) use
for (int j = 0; j < matrix1_columns; j++) in the inner loop.