#include<stdio.h>
int main()
{
long std_id=0;
float score1=0,score2=0,score3=0;
scanf("%ld;%f,%f,%f",&std_id,&score1,&score2,&score3);
printf("The each subject score of No. %d is %.2f, %.2f, %.2f.",std_id,score1,score2,score3);
return 0;
}
不知道为什么用double不可以,用float就可以了

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