first commit

Author: mcps5601

01-basics/arith_order.c

@@ -0,0 +1,6 @@
+#include <stdio.h>
+int main(){
+    int i = 1, j = 2, k = 3;
+    printf("%d\n", i + j * k); // 答案為7
+    printf("%d\n", (i + j) * k); // 答案為9
+}

01-basics/arithmetic.c

@@ -0,0 +1,18 @@
+#include <stdio.h>
+int main(){
+    int a = 2, b = 1;
+    a += b;
+    printf("%d\n", a);
+    a -= b;
+    printf("%d\n", a);
+    a *= b;
+    printf("%d\n", a);
+    a /= b;
+    printf("%d\n", a);
+    a %= b;
+    printf("%d\n", a);
+    a++;
+    printf("%d\n", a);
+    a/=b--;
+    printf("%d\n", a);
+}

01-basics/basic_print.c

@@ -0,0 +1,6 @@
+#include <stdio.h>
+int main() {
+    int a, b;
+    printf("%d\n", a);
+    printf("%d", b);
+}

01-basics/printf.c

@@ -0,0 +1,7 @@
+#include <stdio.h>
+int main() {
+    int year = 2024;
+    int month = 2;
+    int days = 29;
+    printf("今年是%d年\n\n%d月有%d天\n", year, month, days);
+}

02-data-types/data_sizes.c

@@ -0,0 +1,12 @@
+#include <stdio.h>
+int main(){
+    int int_a;
+    // 用 %d 接收 sizeof() 的返回值會出現警告，因為 sizeof() 回傳的是 size_t 型態 (unsigned long int)
+    printf("Size of int: %d\n", sizeof(int_a));
+    float float_a;
+    printf("Size of float: %d\n", sizeof(float_a));
+    char char_a;
+    printf("Size of char: %d\n", sizeof(char_a));
+    double double_a;
+    printf("Size of double: %d\n", sizeof(double_a));
+}

02-data-types/overflow.c

@@ -0,0 +1,8 @@
+#include <stdio.h>
+int main(){
+    int int_a;
+    scanf("%d", &int_a);
+    printf("%d\n", int_a);
+    int_a ++;
+    printf("%d\n", int_a);
+}