1. First, define two integer variables to control the output of a two-dimensional array.

2. Next, initialize the two-dimensional array n[3][4] with different values.

3. Use double loop to output the values in the array.

4. Two-dimensional arrays can be directly assigned with numbers in braces. Each pair of braces represents a line, and the values in each pair of braces represent the values in a line.

5, run the program, you can see the values in the two-dimensional array, and the output is successful.

6. Assign values to only some elements in a two-dimensional array, for example, assign an initial value to only one row.

7. Run the program, you can see that in the array, only the first line has the set initial value, and the values of other lines are all 0.