如何使用C从点检索元素

#include <stdio.h>

struct Point {
    int x;
    int y;
    int value;
};

struct Point searchPoint(struct Point points[], int size, int targetValue) {
    struct Point notFoundPoint = { -1, -1, -1 }; // 未找到时返回的默认值
    
    for (int i = 0; i < size; i++) {
        if (points[i].value == targetValue) {
            return points[i]; // 找到匹配的点，返回该点的信息
        }
    }
    
    return notFoundPoint; // 未找到匹配的点，返回默认值
}

int main() {
    struct Point points[] = {
        { 1, 2, 10 },
        { 3, 4, 20 },
        { 5, 6, 30 },
        { 7, 8, 40 },
        { 9, 10, 50 }
    };
    
    int size = sizeof(points) / sizeof(struct Point);
    int targetValue = 30;
    
    struct Point result = searchPoint(points, size, targetValue);
    
    if (result.value == -1) {
        printf("未找到匹配的点\n");
    } else {
        printf("找到匹配的点：(%d, %d)，数值：%d\n", result.x, result.y, result.value);
    }
    
    return 0;
}