C程序运行后显示Floating Point error:Domain是什么意思？

#include"stdio.h"
#include"conio.h"
#define N 4
struct jcb
{ char name[4];
int length;
int printer;
int tape;
int runtime;
int waittime;
};
struct jcb jcb[N],p;
long memory=6000,tape=8,printer=4;
hrrf()
{int x,y;float a[N],t;
printf("\n****The former****\n");
for(x=0;x<N;x++)
{a[x]=(float)jcb[x].waittime/jcb[x].runtime;
printf("\r%f\n",a[x]);
}

for(y=1;y<=N-1;y++)
for(x=0;x<=N-1-y;x++)
if(a[x]>a[x+1])
{t=a[x];a[x]=a[x+1];a[x+1]=t;}
printf("\n****The latter****\n");
for(x=0;x<N;x++)
printf("\r%f\n",a[x]);

for(y=1;y<=N-1;y++)
for(x=0;x<=N-1-y;x++)
if((float)jcb[x].waittime/jcb[x].runtime>(float)jcb[x+1].waittime/jcb[x+1].runtime)
{p=jcb[x];jcb[x]=jcb[x+1];jcb[x+1]=p;}
for(y=0;y<N;y++)
if((jcb[y].length<=memory)&&(jcb[y].printer<=printer)&&(
jcb[y].tape<=tape))
{printf("\rThe name is:%s\n",jcb[y].name);
memory=memory-jcb[y].length;
printer=printer-jcb[y].printer;
tape=tape-jcb[y].tape; }
}
print(struct jcb jcb[N])
{int x;
printf(" name length printer tape runtime waittime\n");
for(x=0;x<N;x++)
{printf("\r%10s %6d %6d %6d %6d %8d\n\r",jcb[x].name,jcb[x].length,
jcb[x].printer,jcb[x].tape,jcb[x].runtime,jcb[x].waittime);
}}
main()
{struct jcb jcb[4]={{"A",5625,2,5,80,25},{"B",265,3,4,100,50},{"C",512,4,4,500,120},{"D",3973,4,2,875,30}};
int x,m;
clrscr();
hrrf();
printf("Press any key to finish");
getch();
}

主要问题是在main()外面已经定义了一个jcb结构体数组，在main()里又定义了一个jcb结构体数组，并且赋值。程序只识别外部jcb[]，但这个结构体是空的，所以会产生错误。
稍微改动一下就可以了。
#include"stdio.h"
#include"conio.h"
#define N 4
struct jcb
{ char name[4];
int length;
int printer;
int tape;
int runtime;
int waittime;
};
struct jcb jcb[N]={{"A",5625,2,5,80,25},{"B",265,3,4,100,50},{"C",512,4,4,500,120},{"D",3973,4,2,875,30}},p;
long memory=6000,tape=8,printer=4;
void hrrf()
{ int x,y;
float a[N],t;
printf("\n****The former****\n");
for(x=0;x<N;x++)
{ a[x]=(float)jcb[x].waittime/jcb[x].runtime;
printf("\r%f\n",a[x]);
}
for(y=1;y<=N-1;y++)
for(x=0;x<=N-1-y;x++)
if(a[x]>a[x+1])
{ t=a[x];a[x]=a[x+1];
a[x+1]=t;
}
printf("\n****The latter****\n");
for(x=0;x<N;x++)
printf("\r%f\n",a[x]);
for(y=1;y<=N-1;y++)
for(x=0;x<=N-1-y;x++)
if((float)jcb[x].waittime/jcb[x].runtime>(float)jcb[x+1].waittime/jcb[x+1].runtime)
{ p=jcb[x];jcb[x]=jcb[x+1];
jcb[x+1]=p;
}
for(y=0;y<N;y++)
if((jcb[y].length<=memory)&&(jcb[y].printer<=printer)&&(jcb[y].tape<=tape))
{ printf("\rThe name is:%s\n",jcb[y].name);
memory=memory-jcb[y].length;
printer=printer-jcb[y].printer;
tape=tape-jcb[y].tape;
}
}
void print(struct jcb jcb[N])
{ int x;
printf(" name length printer tape runtime waittime\n");
for(x=0;x<N;x++)
{ printf("\r%10s %6d %6d %6d %6d %8d\n\r",jcb[x].name,jcb[x].length,
jcb[x].printer,jcb[x].tape,jcb[x].runtime,jcb[x].waittime);
}
}
void main()
{ //struct jcb jcb[4]={{"A",5625,2,5,80,25},{"B",265,3,4,100,50},{"C",512,4,4,500,120},{"D",3973,4,2,875,30}};
//int x,m;
//clrscr();
hrrf();
printf("Press any key to finish");
getch();
}

温馨提示：内容为网友见解，仅供参考

当前网址：https://11.t2y.org/zz/sqs7qsmf.html