문자열_계산하기(기초)

Author: unn04012

unn04012/stack/string-calculate.js

@@ -0,0 +1,24 @@
+function solution(my_string) {
+  let answer = 0;
+
+  const expression = my_string.split(' ').reverse();
+
+  while (expression.length) {
+    const element = expression.pop();
+
+    if (element === '+') {
+      answer += Number(expression.pop());
+      expression.push(answer);
+    } else if (element === '-') {
+      answer -= Number(expression.pop());
+      expression.push(answer);
+    } else {
+      // 숫자인 경우
+      answer = Number(element);
+    }
+  }
+
+  return answer;
+}
+
+console.log(solution('3 + 4 - 2'));