# [C語言] a864. 4. Stellar Classification
## C語言
## 觀念:
1. scanf會怎麼看待空格和怎麼處理空格後的東西?
"scanf() 讀字串時遇到空格就會斷開，而如果有剩下的部分，會被留在緩衝區裡等待下一次的 scanf()。"
"想要連同空格一起吃入字串的話，可以用fgets()。"[[2]](https://25349023.github.io/articles/2021-02/c-str-0/)
## AC程式碼:

#include<stdio.h>/* for printf and scanf */
#include<stdlib.h>
#include<string.h>/* for strcmp */

int main(){
	char n[1000]= {'\0'};
	float mB=0,mV=0,a=0;
	while(scanf("%s",n)!=EOF){
		if(strcmp(n,"END")==0){
			break;
		}
		scanf("%f %f",&mB,&mV);
		a=mB-mV;
		if(a>=-0.35&&a<=-0.251){
			printf("%s %.2f O\n",n,a);
		}
		else if(a>=-0.25&&a<=-0.001){
			printf("%s %.2f B\n",n,a);
		}
		else if(a>=0.00&&a<=0.249){
			printf("%s %.2f A\n",n,a);
		}
		else if(a>=0.250&&a<=0.499){
			printf("%s %.2f F\n",n,a);
		}
		else if(a>=0.500&&a<=0.999){
			printf("%s %.2f G\n",n,a);
		}
		else if(a>=1.0&&a<=1.499){
			printf("%s %.2f K\n",n,a);
		}
		else if(a>=1.5&&a<=2.0){
			printf("%s %.2f M\n",n,a);
		}
	}
	return 0;
} 

Reference:
[1] [a864. 4. Stellar Classification](https://zerojudge.tw/ShowProblem?problemid=a864)
[2] [[C] 每天來點字串用法（基本篇）](https://25349023.github.io/articles/2021-02/c-str-0/)