PTA day2

#include <stdio.h>
int main()
{
    int H;
    scanf("%d",&H);
    double weight=(H-100)*0.9*2;
    printf("%3.1f",weight);
}

7-8

#include <stdio.h>
int main()
{
    int a,b,c,d;
    scanf("%d %d %d %d",&a,&b,&c,&d);
    int Sum=a+b+c+d;
    float Average=(a+b+c+d)*1.0/4;
    printf("Sum = %d; Average = %3.1f",Sum,Average);
    return 0;
}
//7-9

7-9

#include <stdio.h>
int main()
{
	int a,b;
    b!=0;
	scanf("%d %d",&a,&b);
	printf("a + b = %d\n",a+b);
	printf("a - b = %d\n",a-b);
	printf("a * b = %d\n",a*b);
	if (a==0){
		printf("a / b = 0");
	}
    else{
		if (a%b==0){
		    printf("a / b = %d\n",a/b);
	    }else if(a%b!=0){
	        printf("a / b = %.2f",(a*1.0)/(b*1.0));
	    }
	    }
	return 0;
}

7-10 输入：在一行内输出100以内的非负整数a和b，中间以空格间隔，且保证不为0

输出：其和差积商。注意空格换行。

具体戳此C语言控制输出格式-小数点位数

因a/b输出结果与等号相距太大，故将%6.2f改成%.2f.如图

 不过结果PTA依旧不承认啊啊啊啊啊，明天再钻研吧doge