# include & ltmath.h & gt
int？主()
{
int？a、b、c、d、sum
while(scanf("%d？%d？%d？%d "，& amp壹，& ampb & amp；c，& ampd)？==?4)?{
sum=？a+b+ c+d；
Printf("而對於？:% d \平均值為%.2lf\n "，sum，sum/4.0)；
}
回歸？0;