include <stdio.h>#include <string.h>int main(){ double a = 0; int b = 0; char buf[10]; printf("please int float number: "); scanf("%lf", &a); fflush(stdin); printf("Please enter the specified accuracy: "); scanf("%d", &b); fflush(...
Rounds 2.15 to one decimal place (2.2) =ROUND(2.149, 1) Rounds 2.149 to one decimal place (2.1) =ROUND(-1.475, 2) Rounds -1.475 to two decimal places (-1.48) =ROUND(21.5, -1) Rounds 21.5 to one decimal place to the left of the decimal point (20)...
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StartGenerate_Random_NumberRound_to_4_Decimal_PlacesEnd 序列图 下面是生成随机数并保留4位小数的序列图: SystemMathRandomSystemMathRandomnextDouble()round(number * 10000) / 10000.0Print roundedNumber 经过以上步骤,我们成功生成了一个带有4位小数的随机数,并输出到控制台。这种方法可以在需要精确保留小数位数的...
ROUNDUP behaves like ROUND, except that it always rounds a number up. If num_digits is greater than 0 (zero), then number is rounded up to the specified number of decimal places. If num_digits is 0, then number is rounded up to the nearest integer. If num_digits is less than 0, ...
The old formatting algorithms would generate only a limited number of digits, then would fill the remaining decimal places with zero. They could usually generate strings that would round-trip back to the original floating point value, but weren't great if you wanted the exact value (or the cl...
value DECIMAL(5, 2) ); -- 插入一个数值 INSERT INTO test (value) VALUES (1.245); -- 查询结果,保留一位小数 SELECT ROUND(value, 1) FROM test; 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 执行以上代码,得到的结果为1.2。这是因为小数部分0.245大于等于 0.5,所以向上取整,保留一位小数。
2、使用Math.Round()实现代码 precision变量是Math.Round第二个参数。通过乘10判断小数位数,代码如下: staticdecimalRoundFirstSignificantDigit(decimalinput){intprecision =0;varval = input;while(Math.Abs(val) <1) { val *=10; precision++; }returnMath.Round(input, precision); ...