View Compilation Error

0_0_20282853_3972.c:1:1: error: expected identifier or '(' before 'while'
 while(n--)
 ^
0_0_20282853_3972.c:18:1: error: expected identifier or '(' before '}' token
 }
 ^
0_0_20282853_3972.c:19:1: error: expected identifier or '(' before 'return'
 return 0;
 ^
0_0_20282853_3972.c:21:1: error: expected identifier or '(' before '}' token
 }
 ^