sample project - studentGrade

.vscode/tasks.json

@@ -1,5 +1,71 @@
 {
+    "version": "2.0.0",
+    "runner": "terminal",
+    "type": "shell",
+    "echoCommand": true,
+    "presentation": {
+        "reveal": "always"
+    },
     "tasks": [
+        {
+            "label": "save and compile for C++",
+            "command": "g++",
+            "args": [
+                "-g",
+                "${fileDirname}/*.cpp",
+                "-o",
+                "${fileDirname}/bin/${fileBasenameNoExtension}"
+            ],
+            "group": "build",
+            "problemMatcher": {
+                "fileLocation": [
+                    "relative",
+                    "${workspaceRoot}"
+                ],
+                "pattern": {
+                    "regexp": "^(.*):(\\d+):(\\d+):\\s+(warning error):\\s+(.*)$",
+                    "file": 1,
+                    "line": 2,
+                    "column": 3,
+                    "severity": 4,
+                    "message": 5
+                }
+            }
+        },
+        {
+            "label": "save and compile for C",
+            "command": "gcc",
+            "args": [
+                "-g",
+                "${fileDirname}/*.c",
+                "-o",
+                "${fileDirname}/bin/${fileBasenameNoExtension}"
+            ],
+            "group": "build",
+            "problemMatcher": {
+                "fileLocation": [
+                    "relative",
+                    "${workspaceRoot}"
+                ],
+                "pattern": {
+                    "regexp": "^(.*):(\\d+):(\\d+):\\s+(warning error):\\s+(.*)$",
+                    "file": 1,
+                    "line": 2,
+                    "column": 3,
+                    "severity": 4,
+                    "message": 5
+                }
+            }
+        },
+        {
+            "label": "execute",
+            "command": "cmd",
+            "group": "test",
+            "args": [
+                "/C",
+                "${fileDirname}\\bin\\${fileBasenameNoExtension}"
+            ]
+        },
         {
             "type": "cppbuild",
             "label": "C/C++: gcc.exe 활성 파일 빌드",
@@ -7,7 +73,7 @@
             "args": [
                 "-fdiagnostics-color=always",
                 "-g",
-                "${file}",
+                "${fileDirname}\\*.c",
                 "-o",
                 "${fileDirname}\\bin\\${fileBasenameNoExtension}.exe"
             ],
@@ -23,6 +89,5 @@
             },
             "detail": "디버거에서 생성된 작업입니다."
         }
-    ],
+    ]
-    "version": "2.0.0"
 }

basic/1_printf.c

@@ -12,7 +12,7 @@ int main()
     printf("Price: %f\n", year); // f: 실수 (소수점 아래 6자리)
     printf("Price2: %.2f\n", year); // .2f: 소수점 아래 두 자리 실수
     printf("Grade: %c\n", grade); // c: 문자
-    printf("Message: %s\n", message); // x: 16진수
+    printf("Message: %s\n", message); // s: 문자열
     printf("255 to Hex: %x\n", hexNum); // x: 16진수
 
     return 0;

basic/2_datatype.c

@@ -0,0 +1,16 @@
+#include <stdio.h>
+
+int main()
+{
+    int age = 30;
+    float temperature = 36.6;
+    char grade = 'A';
+    double pi = 3.1415926538;
+
+    printf("Age: %d\n", age);
+    printf("Temperature: %.1f\n", temperature);
+    printf("Grade: %c\n", grade);
+    printf("Pi: %.10f\n", pi);
+
+    return 0;
+}

basic/3_pointer.c

@@ -0,0 +1,16 @@
+#include <stdio.h>
+
+int main()
+{
+    int a = 10;
+    int *p = &a; // p는 a의 주소를 저장
+    // &: 변수의 주소
+    // *: 주소에 저장된 값
+
+    printf("Value of a: %d\n", a);
+    printf("Address of a: %p\n", (void*)&a); // void*: 일반 포인터
+    printf("Address of a: %x\n", p);
+    printf("Pointing value of p: %d\n", *p);
+
+    return 0;
+}

basic/4_memoryManagement.c

@@ -0,0 +1,32 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main()
+{
+    const int COUNT = 5;
+
+    // 동적 메모리 할당, ptr에 동적으로 할당된 메모리의 시작주소 저장
+    int *ptr = (int*)malloc(sizeof(int) * COUNT);
+    if (!ptr)
+    {
+        printf("Fail to malloc\n");
+        return 1;
+    }
+
+    for (int i = 0; i < COUNT; i++)
+    {
+        ptr[i] = i * 10; // 값 초기화
+        printf("%d ", ptr[i]); // 값 출력
+    }
+    printf("\n");
+
+    free(ptr);
+
+    printf("\n");
+    for (int i = 0; i < COUNT; i++)
+    {
+        printf("%d ", ptr[i]); // 값 출력
+    }
+
+    return 0;
+}

basic/5_function.c

@@ -0,0 +1,14 @@
+#include <stdio.h>
+
+int add(int a, int b)
+{
+    return a + b;
+}
+
+int main()
+{
+    int sum = add(5, 3);
+    printf("Sum: %d\n", sum);
+
+    return 0;
+}

basic/6_struct.c

@@ -0,0 +1,19 @@
+#include <stdio.h>
+
+struct Person
+{
+    char name[50];
+    int age;
+    float height;
+};
+
+int main()
+{
+    struct Person person = { "Alice", 30, 170.5 };
+
+    printf("Name: %s\n", person.name);
+    printf("Age: %d\n", person.age);
+    printf("Height: %.2f\n", person.height);
+
+    return 0;
+}

sampleProject/studentGrade/main.c

@@ -0,0 +1,19 @@
+#include <stdio.h>
+#include "student.h"
+
+int main()
+{
+    Student* student1 = createStudent("Bill Gates", 1001, 95.5);
+    Student* student2 = createStudent("Steve Jobs ", 1002, 88.0);
+
+    printStudentInfo(student1);
+    printStudentInfo(student2);
+
+    freeStudent(student1);
+    freeStudent(student2);
+
+    printStudentInfo(student1);
+    printStudentInfo(student2);
+
+    return 0;
+}

sampleProject/studentGrade/student.c

@@ -0,0 +1,40 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "student.h"
+
+// 학생생성 함수
+Student* createStudent(const char* name, int id, float grade)
+{
+    Student* newStudent = (Student*)malloc(sizeof(Student));
+    if (!newStudent)
+    {
+        printf("Fail to student malloc!\n");
+        exit(1);
+    }
+
+    strncpy(newStudent->name, name, sizeof(newStudent->name) - 1); // 가용한 마지막 문자까지 복사하고
+    newStudent->name[sizeof(newStudent->name) - 1] = '\0'; // 마지막\0 null문자 추가로 문자열 종료 보장
+    newStudent->id = id;
+    newStudent->grade = grade;
+
+    return newStudent;
+}
+
+// 학생정보 출력 함수
+void printStudentInfo(const Student* student)
+{
+    if (!student)
+    {
+        printf("Invalid student info.");
+        return;
+    }
+
+    printf("Name: %s, ID: %d, Grade: %.2f\n", student->name, student->id, student->grade);
+}
+
+void freeStudent(Student* student)
+{
+    if (student)
+        free(student);
+}

sampleProject/studentGrade/student.h

@@ -0,0 +1,20 @@
+#ifndef STUDENT_H
+#define STUDENT_H
+
+typedef struct
+{
+    char name[50];
+    int id;
+    float grade;
+} Student;
+
+// 학생 생성 함수
+Student* createStudent(const char* name, int id, float grade);
+
+// 학생정보 출력 함수
+void printStudentInfo(const Student* student);
+
+// 학생 메모리 해제 함수
+void freeStudent(Student* Student);
+
+#endif