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  • IOS 四舍五入 进一法 去尾法

    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

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  • 原文地址:https://www.cnblogs.com/fengfeng159/p/11357998.html
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