/in/foo.c: In function 'Visit':
/in/foo.c:17:9: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
         for( i=q-1;i>=p+1;i--)  
         ^~~
/in/foo.c:19:13: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
             p++;  
             ^
/in/foo.c: In function 'Print':
/in/foo.c:31:13: warning: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
             printf("%7d ",a[i][j]);  
             ^~~~~~
/in/foo.c:31:13: warning: incompatible implicit declaration of built-in function 'printf'
/in/foo.c:31:13: note: include '<stdio.h>' or provide a declaration of 'printf'
/in/foo.c:32:9: warning: incompatible implicit declaration of built-in function 'printf'
         printf("\n");  
         ^~~~~~
/in/foo.c:32:9: note: include '<stdio.h>' or provide a declaration of 'printf'
/in/foo.c: In function 'main':
/in/foo.c:39:5: warning: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
     scanf("%d",&n);  
     ^~~~~
/in/foo.c:39:5: warning: incompatible implicit declaration of built-in function 'scanf'
/in/foo.c:39:5: note: include '<stdio.h>' or provide a declaration of 'scanf'