View Compilation Error

0_0_22345021_15159.cpp: In function 'int main()':
0_0_22345021_15159.cpp:24:38: error: 'm' was not declared in this scope
                 for (int i = n; i >= m; i--) {
                                      ^
0_0_22345021_15159.cpp:28:38: error: 'm' was not declared in this scope
                 for (int i = 1; i <= m; i++) {
                                      ^
0_0_22345021_15159.cpp:31:32: error: 'i' was not declared in this scope
                 printf("%d\n", i * 2); 
                                ^