585), Starting the Prompt Design Site: A New Home in our Stack Exchange Neighborhood, Temporary policy: Generative AI (e.g., ChatGPT) is banned. 2) fixed means everything after JavaScript displaying a float to 2 decimal places, Updating variable values with setprecision. What is the earliest sci-fi work to reference the Titanic? Is it possible to count the number of digits after decimal The complete list. Why doesn't GCC optimize a*a*a*a*a*a to (a*a*a)*(a*a*a)? #define N_DECIMAL_POINTS_PRECISION (1000) // n = 3. Three decimal points. Original code fails as unless the fraction if exactly an integer/power-of-2, the input number, as decimal text, does not convert exactly to the same double. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. And then the idea of storing the user's decimal number specification as a floating point value, loses critical information about the decimal digits: they're simply not there any more. This will print the value of "total" (that's what %, and then ,total does) with 2 floating points (that's what .2f does). #include #include int main () { double d = I want to write a program in C++ to cin a Decimal number and cout the digits after Decimal Return two digit after decimal point in C - OpenGenus IQ So, fixed says that there will be a fixed number of decimal digits after the decimal point. Side note: Floating point numbers may not be exact, so the values you think are present after the decimal point may not be accurate. I found a code but it's not working for some numbers. Is floating-point math consistent in C#? WebUsing header file stdio.h you can easily do it as usual like c. before using %.2lf(set a specific number after % specifier.) Find centralized, trusted content and collaborate around the technologies you use most. Sorted by: 1. You can also cast it to an integer, but be warned y Can the supreme court decision to abolish affirmative action be reversed at any time? In this problem, we have to return two digits ater decimal point using functions. Does a constant Radon-Nikodym derivative imply the measures are multiples of each other? How do I iterate over the words of a string? Is there a way to use DNS to block access to my domain? Difference between and in a sentence. How to find digits after decimal? House Plant identification (Not bromeliad). c - One digit after the decimal point in input - Stack Overflow First we multiply the number by 100.0 as the original number is of the data type double and then typecast it to int. The sum comes out a lot more than the expected. The inaccuracy is multiplied by 10 at each iteration. Cologne and Frankfurt). Novel about a man who moves between timelines, Spaced paragraphs vs indented paragraphs in academic textbooks. How do I iterate over the words of a string? 585), Starting the Prompt Design Site: A New Home in our Stack Exchange Neighborhood, Temporary policy: Generative AI (e.g., ChatGPT) is banned, Finding out the sum of first and the last digit of any number, Fastest way to find the sum of decimal digits. Further OP's numfloat=numfloat*10-digitf; injects repeated rounding errors. For what purpose would a language allow zero-size structs? Same here, "This is not a number". How to inform a co-worker about a lacking technical skill without sounding condescending, Counting Rows where values can be stored in multiple columns. After wildfire smoke traveling south from eastern Canadian provinces brought a marked spell of haze, fumes and copper skies to the northeastern U.S. earlier in June, Maybe the best idea is to solve the problem while the data is in String format. If you have the data as String, you may parse it according to the d 585), Starting the Prompt Design Site: A New Home in our Stack Exchange Neighborhood, Temporary policy: Generative AI (e.g., ChatGPT) is banned, separating decimal points into two integers, How to round a number to n decimal places in Java. For example, below program sets the precision for 4 digits after the decimal point: In C, there is STORY: Kolmogorov N^2 Conjecture Disproved, STORY: man who refused $1M for his discovery, List of 100+ Dynamic Programming Problems, C program to check if given letter is a vowel, consonant or an alphabet, Find Perimeter and Area of rectangle in C Programming, Exploring Library in C [22 member functions], C program to swap two numbers without using third variable [3 techniques], C Program to read last N characters from file, C Program to find Length of a String using Pointer, C Program to count trailing zeros using bitwise operator, C Program to convert number to binary using bitwise operators, Mario less and Mario more - CS50 Exercise. Does a constant Radon-Nikodym derivative imply the measures are multiples of each other? Use the floating number to subtract the floored value to get its fractional part: These updates are intended to help our customers keep their computers up-to-date. We recommend that you install all updates that apply to you. Is it legal to bill a company that made contact for a business proposal, then withdrew based on their policies that existed when they made contact? #include int intpart = (int)num; trunc () : Truncates a double value after the decimal point and float a; // to input a data in the variable a scanf Is there any advantage to a longer term CD that has a lower interest rate than a shorter term CD? You should run your code with a debugger and check step by step the results of your operations, It's worse than @TimBiegeleisen said: it's not that they "may" not be exact, or that the values you think are present "may" not be accurate: they. Try, (The reason why in this example, I haven't joined the loops is that: I want this to be usable on other situations where they use an alternate method of validating input, see the SECOND EXAMPLE for both loops joined): In the above, I have read char instead of reading float. We have covered different cases including Shallow and Deep copy. What do gun control advocates mean when they say "Owning a gun makes you more likely to be a victim of a violent crime. Why do CRT TVs need a HSYNC pulse in signal? Trying to get whole and decimal part of a number into two variables. A Chemical Formula for a fictional Room Temperature Superconductor. A Chemical Formula for a fictional Room Temperature Superconductor. char buf [100]; if (fgets (buf, sizeof buf, stdin) == NULL) Handle_EOF (); char So to count the decimal digits in the specification, you have to store it as a string. Not the answer you're looking for? using printf(). You use the modf function: Setting decimal precision in C - GeeksforGeeks when performing the float-to-integer conversion, or when testing if a number is equal to 0. printf("Enter the positive floating point number: "); OSPF Advertise only loopback not transit VLAN, Short story about a man sacrificing himself to fix a solar sail, Chess-like games and exercises that are useful for chess coaching. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, The future of collective knowledge sharing, About the comment in the "Results:" part that I said it gives me different results sometimes, I also get different results on Codeblocks compared to VS, Btw unless you work with hardware acceleration like GPU or something like that better use. How AlphaDev improved sorting algorithms? int startCounting = 0; Measuring the extent to which two sets of vectors span the same space, How to standardize the color-coding of several 3D and contour plots. Can the subdominant move to the tonic in simple functional harmony? In TikZ, is there a (convenient) way to draw two arrow heads pointing inward with two vertical bars and whitespace between (see sketch)? Then we do modulus 100 to the above result and again typecast it to int as we want an integer result. Searched on this, couldn't find any other workaround than using floor(). Can it be? Example: import math x = 5.55 print ( (math.floor (x*100)%100)) This is will give you two numbers after the decimal point, 55 from that example. @Slava Take a look at the output right above this sentence, compiler printed 34 and 34, the duplicate answer shows that the couts are 34.0000000000000004 or something like that, and as I commented above, the code should have stopped, what I'm really trying to do is compare a float number and int number, if (float >int) the code should continue and if not it should stop so is there any solution? Canadian wildfire maps show where fires continue to burn across scan for the first period from the right, call this position P. scan for the maximum number of decimal digits from position P. 3 Answers. For example, int i = 0.999999 will give i = 0. EDIT: To determine number of digits after it's better solution to use int number_of_digits = string.size() - string.find_last_of('. C++ permits decimal representation of floating point numbers, but as far as I know all extant implementations use binary representation. You could improve this answer by explaining why the original code in question doesn't work (i.e. you should post the compiler options (or at least, the compiler) you are using to run your code, that would be very usefull to spot the problem ;). How Bloombergs engineers built a culture of knowledge sharing, Making computer science more humane at Carnegie Mellon (ep. trunc() , truncf() , truncl() in C language - GeeksforGeeks @hnefatl Kindly take a look at the end of my question, I added a code and it doesn't work. What I tried: Tried to convert the float number to int and received warning by the compiler that the number could be incorrect, tested, was incorrect indeed and couldn't get the expected results. for example 0.26547 -> 5. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. If you then want to get an integer value for the whole part (bearing in mind that you can lose data this way as the range of a float can be larger than that of an int), you can just do: Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. double decpart = num - intpart; Subtracting two float numbers returns an incorrect value, Searched on this but the answers were on a high level that I couldn't understand. return static_cast< int >( dp * 10.0f ); // This Cologne and Frankfurt). But I have some different problem in following code: If I give input as 100.00 then program prints just 100 but not 100.00, setprecision specifies the minimum precision. Asking for help, clarification, or responding to other answers. Many are reporting that showpoint should not be necessary And that's the case also for my system. I made this function, it seems to work fine: June 29 (Reuters) - The U.S. Supreme Court on Thursday struck down race-conscious student admissions programs currently used at Harvard University and the 9.0 must return 0. Uber in Germany (esp. Here is another way: Or for .123456789 (total 45), it prints Sum float 274, and nine digits is well within the precision for which, @EricPostpischil oh I see. How AlphaDev improved sorting algorithms? Cout printing with array pointers - weird behavior. Not the answer you're looking for? Teen builds a spaceship and gets stuck on Mars; "Girl Next Door" uses his prototype to rescue him and also gets stuck on Mars. What do gun control advocates mean when they say "Owning a gun makes you more likely to be a victim of a violent crime."? For example for 0.258 instead of 3, returns 20. How should I ask my new chair not to hire someone? How should I ask my new chair not to hire someone? int main() { Who gave you this exercise? double integral; Connect and share knowledge within a single location that is structured and easy to search. '); The problem with "getting input in @user694733, sorry to say, but I do not know anything about that topic :( I can only help with what I know. scanf("%f", &num); This will help others answer the question. Original code fails as unless the fraction if exactly an integer/power-of-2, the input number, as decimal text, does not convert exactly to the same double.Instead num is ), but I think it might related to, Try explicitly casting your float to an int, Alternatively, you could choose not to use an int, and round a float down using the function floor by including math.h #include , Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Think to the famous painting "This is not a pipe". argv is an array of strings and it has to be converted to double. intgPart = (int)num; Construction of two uncountable sequences which are "interleaved", Cannot set Graph Editor Evaluation Time keyframe handle type to Free, A Chemical Formula for a fictional Room Temperature Superconductor. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Not the answer you're looking for? A small error can lead to a large error when converting a float to an integer. For example, 5.48958123 should be printed as 5.4895 if given precision is 4. rev2023.6.29.43520. Is it possible to count the number of digits after decimal point in C? Yes. For integers it's easy (always zero). For fixed point numbers you can u 6 Answers. First we create a function digit(double a). @EricPostpischil I corrected the code. #include #include void MyPrint (int i) { double d = static_cast (i); std::cout << std::setprecision (6) << std::fixed << How to get numbers after decimal point? - Stack Overflow For example, if the input number is 5412.921445, then the first two digits after decimal point are 92. By clicking Post Your Answer, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct. Quora How Bloombergs engineers built a culture of knowledge sharing, Making computer science more humane at Carnegie Mellon (ep. What do gun control advocates mean when they say "Owning a gun makes you more likely to be a victim of a violent crime."? Not the answer you're looking for? Difference between and in a sentence, House Plant identification (Not bromeliad). How one can establish that the Earth is round? Do I owe my company "fair warning" about issues that won't be solved, before giving notice? or are you asking for any way to print a number with two decimals? 1 Answer. float num; This prev using. float f = 12 Connect and share knowledge within a single location that is structured and easy to search. This can be done by atof. double a inside the bracket is the parameter. How to write 2 digits after decimal point in C++? [duplicate] Closed 5 years ago. I think that using string is the correct way to go in this case, since you don't know a priori the number of digits in the decimal part. But, it wo printf("Num = %f, intpart = %d, decpar What do gun control advocates mean when they say "Owning a gun makes you more likely to be a victim of a violent crime."? What is the term for a thing instantiated by saying it? However, clearly, it cannot work when the requested precision is higher than the internal precision.