C语言 Give a positive integer n not greater than 9 and output a “Snake matrix” with n rows and n columns. For example： Input: 4 output：

Sure, here is the C code that generates a Snake matrix with n rows and n columns for a positive integer n not greater than 9:

#include <stdio.h>

int main() {
    int n, i, j, num = 1;
    int matrix[9][9] = {0};

    printf("Enter a positive integer not greater than 9: ");
    scanf("%d", &n);

    for (i = 0; i < n; i++) {
        if (i % 2 == 0) {
            for (j = 0; j < n; j++) {
                matrix[i][j] = num;
                num++;
            }
        } else {
            for (j = n - 1; j >= 0; j--) {
                matrix[i][j] = num;
                num++;
            }
        }
    }

    printf("The Snake matrix is:\n");
    for (i = 0; i < n; i++) {
        for (j = 0; j < n; j++) {
            printf("%d ", matrix[i][j]);
        }
        printf("\n");
    }

    return 0;
}

This code prompts the user to enter a positive integer not greater than 9, creates an empty matrix of size n x n, and then fills in the matrix in a "snake" pattern by iterating over each row and column. Finally, it prints the matrix to the console.

For example, if the user enters 4, the output will be:

The Snake matrix is:
1 2 3 4 
8 7 6 5 
9 10 11 12 
16 15 14 13 

I hope this helps! Let me know if you have any other questions.