"%%.%df", n);// 构造格式字符串,保留n位小数charstr[50];sprintf(str, format, num);// 将浮点数转换为字符串returnatof(str);// 将字符串转换回浮点数}intmain(){doublenum =9.99999999;intn =3;doubleresult = roundToNDecimalPlaces(num, n);printf("Result: %.3f\n"...
上述代码中,roundToTwoDecimalPlaces函数利用round函数对浮点数进行四舍五入,并将结果保留两个小数位返回。 方法2: 使用sprintf函数 C语言中的sprintf函数可以将浮点数格式化为字符串,并可以指定保留的小数位数。 #include <stdio.h> char* formatToTwoDecimalPlaces(double value) { static char result[50]; sprintf...
double number = 123.456789; double rounded = round_to_n_decimal_places(number, 2); printf("Custom rounded number to 2 decimal places: %.2fn", rounded); return 0; } 这个示例中的round_to_n_decimal_places函数可以处理任意位数的小数。 四、处理浮点数的注意事项 1、浮点数的精度问题 在处理浮点...
write a function that will round a floating-point number to an indicated decimal place.For example the number 17.457 would yield the value 17.46 when it is rounded off to two decimal places. 相关知识点: 试题来源: 解析 #include <stdio.h>#include <string.h>int main(){ double a = 0; ...
How can I multiply two decimals and round the result down to 2 decimal places? For example if the equation is 41.75 x 0.1 the result will be 4.175. If I do this in c# with decimals it will automatically round up to 4.18. I would like to round down to 4.17. I tried using Math....
(Round to 2 decimal places) c. Compute the predetermined plant-wide overhead rate based on direct labor hours. d. Calculate the per unit cost of each product if a plantwide overhead rate is used.(Round to 2 decimal places) e. Calculate the overhead rates for each overhead activity. f...
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Find c. Round to the nearest tenth.] Pythagorean Theorem:The Pythagorean theorem is the concept to reckon when we are given the task of finding the length of a side of a right triangle if the lengths of the other two sides are known or given....
num = num - int(num) while num != 0: num = num * 10 count = count + 1 ...
// round to 1 decimal digits fixed_point_t price_rounded2 = price + addend2; // round to 2 decimal digits fixed_point_t price_rounded3 = price + addend3; // round to 3 decimal digits fixed_point_t price_rounded4 = price + addend4; ...