一、字符串转int func Atoi(s string) (int, error)
案例：
执行结果：
sf@SFdeMacBook-Pro ~/Documents/project/src/test go build int_string.go
sf@SFdeMacBook-Pro ~/Documents/project/src/test ./int_string
int, 100
二、int转字符串 func Itoa(i int) string
执行结果： sf@SFdeMacBook-Pro ~/Documents/project/src/test go build int_string.go sf@SFdeMacBook-Pro ~/Documents/project/src/test ./int_string string,100
