#include <stdio.h>

int main(){
??? double price=a;
??? int num=b;
??? float c＝0；
??? scanf("%lf,%d",&a,&b);
??? c=num*price;
??? printf("應(yīng)付款：%f\n",c);
??? return 0;
}

#include?<stdio.h>

int?main(){
	double?price=0;
	double?c=0;
	int?num=0;
	scanf("%lf,%d",&price,&num);
	c=num*price;
	printf("應(yīng)付款：%f\n",c);
	return?0;
}

#include?<stdio.h>

int?main(){
	float?price=0;
	float?c=0;
	int?num=0;
	scanf("%f,%d",&price,&num);
	c=num*price;
	printf("應(yīng)付款：%f\n",c);
	return?0;
}

?。。。。。。。。。。。。。?！

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