WhyCan Forum(哇酷开发者社区)

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#define PI 3.14159265359
int main(int argc , char **argv)
{
    if(argc != 4)
    {
        printf("error! such as: ./test 1 2 3\r\n");
        return -1;
    }
    double longitude = atof(argv[1]); //经度
    double latitude = atof(argv[2]); //纬度
    int zoom = atoi(argv[3]); //级别
    double xtile, ytile;
    printf("%f %f %d \r\n", longitude, latitude, zoom);
    
    latitude = latitude / 180.0 * PI; //角度转弧度
    xtile = (longitude + 180.0) / 360.0 * pow(2.0, zoom); //计算地图瓦片坐标x
    ytile = (1.0 - asinh(tan(latitude)) / PI) / 2.0 * pow(2.0, zoom); //计算地图瓦片坐标y
    printf("\r\nxtile: %f \r\nytile: %f \r\nzoom: %d \r\n", xtile, ytile, zoom); 

    return 0;
}

lzq@lzq:~/desktop$ ./map 113.865221 29.714519 18
113.865221 29.714519 18 

xtile: 213986.123594 
ytile: 108393.812937 
zoom: 18 
lzq@lzq:~/desktop$