“const char*”类型的值不能用于初始化“char”类型的实体，这句话不明白什么意思

#include <stdio.h>

#include <stdlib.h>



typedef struct Student

{

	char num[7];    //学号

	char name[10];  //姓名

	char sex[3];    //性别

	short age;      //年龄

}Student;



typedef Student DataType;

#include "SeqList.h"



void main()

{

	int i;

	SeqList* myList = NULL;

	//DataType* List = (DataType*)malloc(myList->maxSize * sizeof(DataType));



	DataType stu[3] = {{2000001,"张 三","男",20},

						{2000002,"李 四","男",21},

						{2000003,"王 五","女",22}};



	myList = Initiate(100);        //初始化一个顺序表



	for(i = 0; i < 3; i++)              //插入数据

	{

		Insert(stu[i],i,myList);

	}



	for(i = 0; i < 3; i++)

	{

		DataType item;

		item = GetData(i,myList);

		printf(" %c   %c   %c   %d\n",item.num,item.name,item.sex,item.age);

	}

	printf("\n\n删除数据后：\n\n");



	Delete(3,myList);



	for(i = 0; i < 3; i++)

	{

		DataType item;

		item = GetData(i,myList);

		printf(" %c   %c   %c   %d\n",item.num,item.name,item.sex,item.age);

	}

	printf("\n");

}