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哪里出问题了,帮帮忙呀,我实在是找不出来啦!!!!!#include<stdio.h>
#include<math.h>
void main ()
{
int n,a[20],b[20],i,sum=0,j;
for(;;)
{ scanf("%d",&n);
if(n==-1) goto end;
for(i=0;i<n;i++)
scanf("%d %d",&a[i],&b[i]);
if(n==1) printf("%d miles\n",a[0]*b[0]);
else
{ sum=0;
for(j=1;j<n;j++)
sum=sum+a[0]*b[0]+a[j]*(b[j]-b[j-1]);
printf("%d miles\n",sum);
}
end:;
}
}
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