Main.c: In function ‘bijiao’:
Main.c:25:12: error: ‘a1’ undeclared (first use in this function); did you mean ‘c1’?
   25 |         *m=a1[t];
      |            ^~
      |            c1
Main.c:25:12: note: each undeclared identifier is reported only once for each function it appears in
Main.c:25:15: error: ‘t’ undeclared (first use in this function)
   25 |         *m=a1[t];
      |               ^
Main.c: In function ‘main’:
Main.c:51:3: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
   51 |   scanf("%d",&T);
      |   ^~~~~~~~~~~~~~
Main.c:55:7: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
   55 |       scanf("%d",&n);
      |       ^~~~~~~~~~~~~~
Main.c:56:7: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
   56 |       scanf("%s",a[t]);
      |       ^~~~~~~~~~~~~~~~