zoukankan      html  css  js  c++  java
  • IOS 四舍五入 进一法 去尾法

    float numberToRound;

       int result;

     

        numberToRound = 4.51;

        result = (int)roundf(numberToRound);

        NSLog(@"roundf(%f) = %d", numberToRound, result); // roundf(4.510000) = 5


        result = (int)ceilf(numberToRound);

        NSLog(@"ceilf(%f) = %d", numberToRound, result); // ceilf(4.510000) = 5


        result = (int)floorf(numberToRound);

        NSLog(@"floorf(%f) = %d", numberToRound, result); // floorf(4.510000) = 4


        numberToRound = 10.49;

        result = (int)roundf(numberToRound);

        NSLog(@"roundf(%f) = %d", numberToRound, result); // roundf(10.490000) = 10


        result = (int)ceilf(numberToRound);

        NSLog(@"ceilf(%f) = %d", numberToRound, result); // ceilf(10.490000) = 11


        result = (int)floorf(numberToRound);

        NSLog(@"floorf(%f) = %d", numberToRound, result); // floorf(10.490000) = 10


        numberToRound = -2.49;

        result = (int)roundf(numberToRound);

        NSLog(@"roundf(%f) = %d", numberToRound, result); // roundf(-2.490000) = -2


        result = (int)ceilf(numberToRound);

        NSLog(@"ceilf(%f) = %d", numberToRound, result); // ceilf(-2.490000) = -2


        result = (int)floorf(numberToRound);

        NSLog(@"floorf(%f) = %d", numberToRound, result); // floorf(-2.490000) = -3


        numberToRound = -3.51;

        result = (int)roundf(numberToRound);

        NSLog(@"roundf(%f) = %d", numberToRound, result); // roundf(-3.510000) = -4


        result = (int)ceilf(numberToRound);

        NSLog(@"ceilf(%f) = %d", numberToRound, result); // ceilf(-3.510000) = -3


        result = (int)floorf(numberToRound);

        NSLog(@"floorf(%f) = %d", numberToRound, result); // floorf(-3.510000) = -4

  • 相关阅读:
    Hadoop实战课程
    R语言实战读书笔记(七)基本统计分析
    R语言实战读书笔记(六)基本图形
    python-unexpected content storage modification出错
    python——no module named XX
    R语言实战读书笔记(五)高级数据管理
    R语言缺失值信息处理
    R语言,NA,NAN
    R语言实战读书笔记(四)基本数据管理
    R语言实战读书笔记(三)图形初阶
  • 原文地址:https://www.cnblogs.com/yujidewu/p/5724966.html
Copyright © 2011-2022 走看看