0_0_38889302_14640.c: In function 'main':
0_0_38889302_14640.c:15:54: error: 'a' undeclared (first use in this function)
15 | for(int j=i;j>=0&&j!=a;j--){
| ^
0_0_38889302_14640.c:15:54: note: each undeclared identifier is reported only once for each function it appears in
|