https://blog.sobamemil.com/en/tags/stdlib.h/ Recent content in Stdlib.h on Sobamemil https://blog.sobamemil.com/images/og-image.png https://blog.sobamemil.com/images/og-image.png Hugo en Fri, 28 Feb 2020 20:00:03 +0900 https://blog.sobamemil.com/en/posts/041-%EB%AA%85%ED%92%88-c-programming-%EC%8B%A4%EC%8A%B5-%EB%AC%B8%EC%A0%9C-2%EC%9E%A5-15%EB%B2%88/ Fri, 28 Feb 2020 20:00:03 +0900 https://blog.sobamemil.com/en/posts/041-%EB%AA%85%ED%92%88-c-programming-%EC%8B%A4%EC%8A%B5-%EB%AC%B8%EC%A0%9C-2%EC%9E%A5-15%EB%B2%88/ <p><b>Problem:</b></p> <p>덧셈(+), 뺄셈(-), 곱셈(*), 나눗셈(/), 나머지(%)의 정수 5척 연산을 할 수 있는 프로그램을 작성하라. 식은 다음과 같은 형식으로 입력된다. 정수와 연산자는 하나의 빈칸으로 분리된다.</p> <p><img loading="lazy" src="https://img.sobamemil.com/posts/41/img_1.png"></p> <p><b>Objective &amp; Hints:</b></p> <p>공백을 포함하는 문자열 읽기, C++ 프로그램 종합 응용</p> <p>한 줄을 문자열로 읽고, 공백 문자를 찾아 연산자와 두 개의 피연산자를 구분한 후, 계산하면 됩니다.</p> <p>문자열을 정수로 바꿀 때 atoi() 함수를 이용하면 됩니다.</p> <p>예를 들면 atoi(&quot;34&quot;) = 34 입니다.</p> <p><b>Execution Result:</b></p> <p><img loading="lazy" src="https://img.sobamemil.com/posts/41/img_2.png"></p> <p><b>Code:</b></p> <table> <thead> <tr> <th></th> <th></th> </tr> </thead> <tbody> <tr> <td>1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37</td> <td>#include<iostream> #include<cstring> #include<cstdlib> using namespace std; int main(){ char sic[100]; char *symbol; int front,rear; while(true){ cout &lt;&lt; &quot;? &quot;; cin.getline(sic,100); front = atoi(strtok(sic, &quot; &quot;)); symbol = strtok(NULL, &quot; &quot;); rear = atoi(strtok(NULL, &quot; &quot;)); if(*symbol == '+'){ cout &lt;&lt; front &lt;&lt; &quot; + &quot; &lt;&lt; rear &lt;&lt; &quot; = &quot; &lt;&lt; front+rear &lt;&lt; endl; } else if(*symbol == '-'){ cout &lt;&lt; front &lt;&lt; &quot; - &quot; &lt;&lt; rear &lt;&lt; &quot; = &quot; &lt;&lt; front-rear &lt;&lt; endl; } else if(*symbol == '*'){ cout &lt;&lt; front &lt;&lt; &quot; * &quot; &lt;&lt; rear &lt;&lt; &quot; = &quot; &lt;&lt; front*rear &lt;&lt; endl; } else if(*symbol == '/'){ cout &lt;&lt; front &lt;&lt; &quot; / &quot; &lt;&lt; rear &lt;&lt; &quot; = &quot; &lt;&lt; front/rear &lt;&lt; endl; } else if(*symbol == '%'){ cout &lt;&lt; front &lt;&lt; &quot; % &quot; &lt;&lt; rear &lt;&lt; &quot; = &quot; &lt;&lt; front%rear &lt;&lt; endl; } } return 0; }</td> </tr> </tbody> </table> <p><b>Explanation:</b></p>