怎样用C语言实现银行家算法?

#include<stdio.h>
struct claim
{
int user;
int num[3];
}claims;
int input()
{
printf("please input your request:user(0~4):\n");
scanf("%d",&claims.user);
printf("input the number of resource a:\n");
scanf("%d",&claims.num[0]);
printf("input the number of resource b:\n");
scanf("%d",&claims.num[1]);
printf("input the number of resource c:\n");
scanf("%d",&claims.num[2]);
return 1;
}
int safety_chk(int alloc[][3],int need[][3],int avail[3])
{
int work[3],finish[5];
for(int p=0;p<5;p++)//i大于2后对WORK是无意义的
{
work[p]=avail[p];
finish[p]=0;
}
for(int i=0;i<5;i++)
{
if(finish[i]==0&&
need[i][0]<=work[0]&&
need[i][1]<