View Compilation Error

0_0_13944350_13961.cpp: In function 'int main()':
0_0_13944350_13961.cpp:16:21: error: 'nNum' was not declared in this scope
    for (j = 0; j <= nNum; j++){
                     ^
0_0_13944350_13961.cpp:21:21: error: 'nNum' was not declared in this scope
    for (j = 0; j <= nNum; j++){
                     ^
0_0_13944350_13961.cpp:26:21: error: 'nNum' was not declared in this scope
   printf("%d\n", c1[nNum]);
                     ^