PROGRAMMING:One way linked list 5

Define a one-way linked list struct node and implement it: input several student information (including student number, name and grade), when the student number is 0, the input ends, and then input a grade value, delete the student information whose grade is less than the value, and output the student information whose grade is greater than or equal to the value.
Input and output example: description in brackets
###Input example:
```in
1 zhang 78
2 wang 80
3 li 75
4 zhao 85
0
eighty
```
###Output example:
```out
2 wang 80
4 zhao 85
```






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