View Compilation Error

0_0_21489498_29158.cpp: In function 'int nextInt()':
0_0_21489498_29158.cpp:6:8: error: 'c' was not declared in this scope
     do c=getchar(); while (c<'0'||c>'9');
        ^
0_0_21489498_29158.cpp:6:28: error: 'c' was not declared in this scope
     do c=getchar(); while (c<'0'||c>'9');
                            ^