Language: C

#include <stdio.h>

int main(){
    int n,i,j,k,m,w,now;
    int *pn,*pi,*pj,*pk,*pm,*pw,*pnow;
    pn=n;pi=i;pj=j;pk=k;pm=m;pw=w;pnow=now;

    scanf("%d",&pn);

    int a[n],b[n],b2[n];
    int *pa,*pb,*pb2;

    pa=a;pb=b;pb2=b2;

    for(pi=0;pi<pn;pi++){
        scanf("%d",&pa[pi]);
    }

    for(pj=0;pj<pn;pj++){
        pnow = pa[j];
        pb[j] = pnow;
        pb2[j] = pnow;
        /*逆向きに並べ替える必要あり。*/
        pk = 0;
        pm = j;
        while(pk<pj){
            pb[pk] = pb2[pm];
            pk++;
            pm = pm-1;
        }
    }

    for(pw=0;pw<pn;pw++){
        printf("%d ",pb[pw]);
    }

    return 0;
}

Compiler output:
main.c: In function 'main':
main.c:6:7: error: assignment to 'int *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
    6 |     pn=n;pi=i;pj=j;pk=k;pm=m;pw=w;pnow=now;
      |       ^
main.c:6:12: error: assignment to 'int *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
    6 |     pn=n;pi=i;pj=j;pk=k;pm=m;pw=w;pnow=now;
      |            ^
main.c:6:17: error: assignment to 'int *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
    6 |     pn=n;pi=i;pj=j;pk=k;pm=m;pw=w;pnow=now;
      |                 ^
main.c:6:22: error: assignment to 'int *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
    6 |     pn=n;pi=i;pj=j;pk=k;pm=m;pw=w;pnow=now;
      |                      ^
main.c:6:27: error: assignment to 'int *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
    6 |     pn=n;pi=i;pj=j;pk=k;pm=m;pw=w;pnow=now;
      |                           ^
main.c:6:32: error: assignment to 'int *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
    6 |     pn=n;pi=i;pj=j;pk=k;pm=m;pw=w;pnow=now;
      |                                ^
main.c:6:39: error: assignment to 'int *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
    6 |     pn=n;pi=i;pj=j;pk=k;pm=m;pw=w;pnow=now;
      |                                       ^
main.c:16:23: error: array subscript is not an integer
   16 |         scanf("%d",&pa[pi]);
      |                       ^
main.c:20:14: error: assignment to 'int *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
   20 |         pnow = pa[j];
      |              ^
main.c:21:15: error: assignment to 'int' from 'int *' makes integer from pointer without a cast [-Wint-conversion]
   21 |         pb[j] = pnow;
      |               ^
main.c:22:16: error: assignment to 'int' from 'int *' makes integer from pointer without a cast [-Wint-conversion]
   22 |         pb2[j] = pnow;
      |                ^
main.c:25:12: error: assignment to 'int *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
   25 |         pm = j;
      |            ^
main.c:27:15: error: array subscript is not an integer
   27 |             pb[pk] = pb2[pm];
      |               ^
main.c:27:25: error: array subscript is not an integer
   27 |             pb[pk] = pb2[pm];
      |                         ^
main.c:34:24: error: array subscript is not an integer
   34 |         printf("%d ",pb[pw]);
      |                        ^