C语言求解汽油里程

#include
int main()
{
int gallons;//每次加油量
int miles;//每次加完油行驶的里程
int total;
unsigned int counter;//计数器

float average;
counter=0;
total=0;
printf("%s",“请输入添加的汽油量”);
scanf("%d",&gallons);
printf("%s",“请输入行驶里程”);
scanf("%d",&miles);
while(gallons!=-1&&miles!=-1)
{
total=total+miles/gallons;
counter=counter+1;
printf("%s",“请输入添加的汽油量”);
scanf("%d",&gallons);
printf("%s",“请输入行驶里程”);
scanf("%d",&miles);
}
if(counter!=0)
{
average=(float)total/counter;
printf("%0.2fn",average);
}
else
printf(“无数据”);
return 0;
}