foo.c: In function 'Output':
foo.c:9:17: warning: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
    9 |                 printf("%d ",a[i]);
      |                 ^~~~~~
foo.c:2:1: note: include '<stdio.h>' or provide a declaration of 'printf'
    1 | #include<stdlib.h>
  +++ |+#include <stdio.h>
    2 | 
foo.c:9:17: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
    9 |                 printf("%d ",a[i]);
      |                 ^~~~~~
foo.c:9:17: note: include '<stdio.h>' or provide a declaration of 'printf'
foo.c: In function 'main':
foo.c:45:5: warning: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
   45 |     scanf("%d%d%d",&n1,&n2,&n3);
      |     ^~~~~
foo.c:45:5: note: include '<stdio.h>' or provide a declaration of 'scanf'
foo.c:45:5: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
foo.c:45:5: note: include '<stdio.h>' or provide a declaration of 'scanf'
foo.c:63:5: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
   63 |     printf("\n");
      |     ^~~~~~
foo.c:63:5: note: include '<stdio.h>' or provide a declaration of 'printf'

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