Finish: 01-arrays - 数组

stage04-composite-types/01-arrays/main.go

@@ -7,13 +7,13 @@ func exercise1() [5]int {
 
 	// 声明一个长度为5的int数组
 	// 初始化所有元素为10
-	var arr ____
+	var arr [5]int
 
-	for i := 0; i < ____(arr); i++ {
+	for i := 0; i < len(arr); i++ {
-		arr[i] = ____
+		arr[i] = 10
 	}
 
-	return ____
+	return arr
 }
 
 func exercise2() string {
@@ -22,7 +22,7 @@ func exercise2() string {
 	// 修改数组元素并返回修改后的字符串表示
 	fruits := [4]string{"苹果", "香蕉", "橙子", "葡萄"}
 
-	fruits[____] = "芒果"
+	fruits[0] = "芒果"
 
 	fmt.Printf("修改后的水果: %s\n", fruits)
 
@@ -35,13 +35,13 @@ func exercise3() int {
 	// 计算数组所有元素的和
 	numbers := [5]int{10, 20, 30, 40, 50}
 
-	sum := ____
+	sum := 0
 
-	for i := 0; i < ____(numbers); i++ {
+	for i := 0; i < len(numbers); i++ {
-		sum += ____
+		sum += numbers[i]
 	}
 
-	return ____
+	return sum
 }
 
 func exercise4() [3]int {
@@ -51,11 +51,11 @@ func exercise4() [3]int {
 	// 修改原数组，观察拷贝的数组是否变化
 	arr1 := [3]int{1, 2, 3}
 
-	arr2 := ____
+	arr2 := arr1
 
 	arr1[0] = 99
 
-	return ____
+	return arr2
 }
 
 func exercise5() int {
@@ -64,19 +64,19 @@ func exercise5() int {
 	// 计算二维数组的和
 	matrix := [3][2]int{{1, 2}, {3, 4}, {5, 6}}
 
-	sum := ____
+	sum := 0
 
-	for i := 0; i < ____(matrix); i++ {
+	for i := 0; i < len(matrix); i++ {
-		for j := 0; j < ____(matrix[i]); j++ {
+		for j := 0; j < len(matrix[i]); j++ {
-			sum += ____
+			sum += matrix[i][j]
 		}
 	}
 
-	return ____
+	return sum
 }
 
 func main() {
-	fmt.Println("=== 数组 练习 ===\n")
+	fmt.Println("=== 数组 练习 ===")
 
 	result1 := exercise1()
 	fmt.Printf("练习1结果: %v\n", result1)