2.41. Go language type conversion

发布时间 :2023-10-12 23:00:09 UTC      

Type conversion is used to convert a variable of one data type to another. The basic format of Go language type conversion is as follows:

type_name(expression)

type_name is the type, expression is an expression.

2.41.1. Example #

In the following example, an integer is converted to a floating-point type, the result is calculated, and the result is assigned to a floating-point variable:

Example #

package main
import "fmt"
func main() {
   var sum int = 17
   var count int = 5
   var mean float32

   mean = float32(sum)/float32(count)
   fmt.Printf("The value of mean is: %f\\n",mean)
}

The output of the above example is as follows:

The value of mean is: 3.400000

Principles, Technologies, and Methods of Geographic Information Systems  102

In recent years, Geographic Information Systems (GIS) have undergone rapid development in both theoretical and practical dimensions. GIS has been widely applied for modeling and decision-making support across various fields such as urban management, regional planning, and environmental remediation, establishing geographic information as a vital component of the information era. The introduction of the “Digital Earth” concept has further accelerated the advancement of GIS, which serves as its technical foundation. Concurrently, scholars have been dedicated to theoretical research in areas like spatial cognition, spatial data uncertainty, and the formalization of spatial relationships. This reflects the dual nature of GIS as both an applied technology and an academic discipline, with the two aspects forming a mutually reinforcing cycle of progress.