✨ Added solution to 1232

Sathish Babu · Sathish Babu · commit b90654b53cd6 · 2020-06-04T10:08:21.000+05:30
diff --git a/src/1232.Check-If-It-Is-a-Straight-Line/README.md b/src/1232.Check-If-It-Is-a-Straight-Line/README.md
@@ -5,11 +5,20 @@
 
 ## Description
 
+You are given an array coordinates, coordinates[i] = [x, y], where [x, y] represents the coordinate of a point. Check if these points make a straight line in the XY plane.
+
+**Example 1:**
+
+```
+Input: coordinates = [[1,2],[2,3],[3,4],[4,5],[5,6],[6,7]]
+Output: true
+```
+
 **Example 1:**
 
 ```
-Input: a = "11", b = "1"
-Output: "100"
+Input: coordinates = [[1,1],[2,2],[3,4],[4,5],[5,6],[7,7]]
+Output: false
 ```
 
 ## 题意
diff --git a/src/1232.Check-If-It-Is-a-Straight-Line/Solution.go b/src/1232.Check-If-It-Is-a-Straight-Line/Solution.go
@@ -1,5 +1,14 @@
 package Solution
 
-func Solution(x bool) bool {
-	return x
+func Solution(coordinates [][]int) bool {
+	dx0 := coordinates[1][0] - coordinates[0][0]
+	dy0 := coordinates[1][1] - coordinates[0][1]
+	for i := 1; i < len(coordinates)-1; i++ {
+		dx := coordinates[i+1][0] - coordinates[i][0]
+		dy := coordinates[i+1][1] - coordinates[i][1]
+		if dy*dx0 != dy0*dx {
+			return false
+		}
+	}
+	return true
 }
diff --git a/src/1232.Check-If-It-Is-a-Straight-Line/Solution_test.go b/src/1232.Check-If-It-Is-a-Straight-Line/Solution_test.go
@@ -10,12 +10,11 @@ func TestSolution(t *testing.T) {
 	//	测试用例
 	cases := []struct {
 		name   string
-		inputs bool
+		inputs [][]int
 		expect bool
 	}{
-		{"TestCase", true, true},
-		{"TestCase", true, true},
-		{"TestCase", false, false},
+		{"TestCase", [][]int{{1, 2}, {2, 3}, {3, 4}, {4, 5}, {5, 6}, {6, 7}}, true},
+		{"TestCase", [][]int{{1, 1}, {2, 2}, {3, 4}, {4, 5}, {5, 6}, {7, 7}}, false},
 	}
 
 	//	开始测试
