出现以下问题如何解决？

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#define max_number 20 
struct student{
	int number;
	char name[max_number];
	char gender[max_number];
	char banji[max_number];
	struct score *head;
	struct student *next;
};
typedef struct student stu;
struct score{ 
	char number[max_number];
	char name[max_number];
	double fenshu;
	struct score *next;
};
typedef struct score sco;

stu* file_to_cpp(FILE *fp,stu *head){
	int n,m,i,j;
	char str1[50],str2[50],str3[50];
	stu *stu_r,*stu_s;
	sco *sco_r,*sco_s;
	head=(stu*)malloc(sizeof(stu));
	fp=fopen("C:\\Users\\Administrator\\Desktop\\student1.txt","a+");
	fscanf(fp,"%d %d",&n,&m);
	fscanf(fp,"%s %s",str1,str2);
	fscanf(fp,"%s %s",str1,str2);
	for(i=0;i<m;i++){
		fscanf(fp,"%s %s %s",str1,str2,str3);
	}
	stu_r=head;
	for(i=0;i<n;i++){
		stu_s=(stu*)malloc(sizeof(stu));
		fscanf(fp," %d",&stu_s->number);
		fscanf(fp," %s",stu_s->name);
		fscanf(fp," %s",stu_s->gender);
		fscanf(fp," %s",stu_s->banji);
		stu_s->head=(sco*)malloc(sizeof(sco));
		sco_r=stu_s->head;
			for(j=0;j<m;j++){
				sco_s=(sco*)malloc(sizeof(sco));
				fscanf(fp," %s",sco_s->number);
				fscanf(fp," %s",sco_s->name);
				fscanf(fp," %lf",&sco_s->fenshu);
				sco_r->next=sco_s;
				sco_r=sco_r->next;
			}
		sco_r->next=NULL;
		stu_r->next=stu_s;
		stu_r=stu_r->next;
		}
		stu_r->next=NULL;
		fclose(fp);
	return head;
}
int main(int argc, char *argv[]) {
	FILE *fp;
	int n,m;
	printf("欢迎使用学生成绩管理系统!\n");
	if((fp=fopen("C:\\Users\\Administrator\\Desktop\\student1.txt","r"))==NULL)
	{
		initialization(fp);
		printf("系统初始化成功!\n");
	}
	stu *head;
	head=file_to_cpp(fp,head);
	menu_all(head);
	return 0;
}

C语言assignment makes pointer from integer without a cast怎么消除警告 

有时会出现assignment makes pointer from integer without a cast，有时不会

 希望对您有帮助，盼采纳：https://blog.csdn.net/it_xiangqiang/category_10581430.html