/in/foo.c: In function 'main':
/in/foo.c:8:4: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
    for(i=b;i>=1;i--)
    ^~~
/in/foo.c:14:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
     printf("%d",k);
     ^~~~~~
/in/foo.c:4:18: warning: unused variable 't' [-Wunused-variable]
  int a,b,n,k=0,i,t=0;
                  ^