该设备有问题代码43_这个代码有什么问题？
#include <stdio.h>
int main(void)
{
int a,b;
scanf("%d%d",&a,&b);
switch(b)
{
case 1:
printf("Faint signals, barely perceptible, ");
break;
case 2:
printf("Very weak signals, ");
break;
case 3:
printf("Weak signals, ");
break;
case 4:
printf("Fair signals, ");
break;
case 5:
printf("Fairly good signals, ");
break;
case 6:
printf("Good signals, ");
break;
case 7:
printf("Moderately strong signals, ");
break;
case 8:
printf("Strong signals, ");
break;
case 9:
printf("Extremely strong signals, ");
break;
}
switch(a)
{
case 1:
printf("unreadable");
break;
case 2:
printf("barely readable, occasional words distinguishable");
break;
case 3:
printf("readable with considerable difficulty");
break;
case 4:
printf("readable with practically no difficulty");
break;
case 5:
printf("perfectly readable");
break;
}
return 0;
}
补充：执行scanf("%d%d",&a,&b);之后就崩溃了。