github.com/bgentry/go@v0.0.0-20150121062915-6cf5a733d54d/src/math/big/example_test.go (about)

     1  // Copyright 2012 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package big_test
     6  
     7  import (
     8  	"fmt"
     9  	"log"
    10  	"math/big"
    11  )
    12  
    13  func ExampleRat_SetString() {
    14  	r := new(big.Rat)
    15  	r.SetString("355/113")
    16  	fmt.Println(r.FloatString(3))
    17  	// Output: 3.142
    18  }
    19  
    20  func ExampleInt_SetString() {
    21  	i := new(big.Int)
    22  	i.SetString("644", 8) // octal
    23  	fmt.Println(i)
    24  	// Output: 420
    25  }
    26  
    27  func ExampleRat_Scan() {
    28  	// The Scan function is rarely used directly;
    29  	// the fmt package recognizes it as an implementation of fmt.Scanner.
    30  	r := new(big.Rat)
    31  	_, err := fmt.Sscan("1.5000", r)
    32  	if err != nil {
    33  		log.Println("error scanning value:", err)
    34  	} else {
    35  		fmt.Println(r)
    36  	}
    37  	// Output: 3/2
    38  }
    39  
    40  func ExampleInt_Scan() {
    41  	// The Scan function is rarely used directly;
    42  	// the fmt package recognizes it as an implementation of fmt.Scanner.
    43  	i := new(big.Int)
    44  	_, err := fmt.Sscan("18446744073709551617", i)
    45  	if err != nil {
    46  		log.Println("error scanning value:", err)
    47  	} else {
    48  		fmt.Println(i)
    49  	}
    50  	// Output: 18446744073709551617
    51  }