Node.js) 백준 29614번: 학점 계산기

https://www.acmicpc.net/problem/29614

29614번: 학점계산프로그램

 

const input = require('fs')
	.readFileSync('./dev/stdin')
	.toString()
	.trim();
let x = 0;
let y = 0;

for(let i = 0; i<input.length; i++){
    const char = input[i];
    switch(char){
        case 'A':
            y++;
            x+=4;
            break;
        case 'B':
            y++;
            x+=3;
            break;
        case 'C':
            y++;
            x+=2;
            break;
        case 'D':
            y++;
            x+=1;
            break;
        case 'F':
            y++;
            break;
        case '+':
            x+=0.5
            break;
                
    }
}
console.log((x/y).toFixed(5));