how to get digits after decimal in chow to get digits after decimal in c

How to set, clear, and toggle a single bit? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, The future of collective knowledge sharing. Closed 5 years ago. How do you round a double in Dart to a given degree of precision AFTER the decimal point? How to get numbers after decimal point? - Stack Overflow A Chemical Formula for a fictional Room Temperature Superconductor. int GetFirstDecimalPlace( float f ) { const float dp = f - floorf( f ); // This simply gives all the values after the // decimal point. 1 Answer. double fractional = some_double - floor(some_double); For example for 0.258 instead of 3, returns 20. Searched on this, couldn't find any other workaround than using floor(). Cologne and Frankfurt). Do not transform to float but work with character string. Image Processing: Algorithm Improvement for 'Coca-Cola Can' Recognition, Get decimal portion of a number with JavaScript. Yet that closest double may have many more digits when manipulated. Is Logistic Regression a classification or prediction model? rev2023.6.29.43520. 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 June 2023 updates for Microsoft Office - Microsoft Support how can i solve that ? Uber in Germany (esp. Cout printing with array pointers - weird behavior. Following is the approach to solve the problem: Following is the implemention of the code in C programming language: With this article at OpenGenus, you must have the complete idea of how to return two digit after decimal point in C. In this article, we have explained how to copy a struct in C Programming Language to another struct. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. What should be included in error messages? Use the floating number to subtract the floored value to get its fractional part: 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, How do I iterate over the words of a string? Return two digit after decimal point in C, OpenGenus IQ: Computing Expertise & Legacy, Position of India at ICPC World Finals (1999 to 2021). We create a variable named input of the data type double and take input through argv. conversion between binary and decimal systems, which result in slightly different values because of finite precision of the types), which I think is the core of the problem. but imperfection representations of numbers. Find centralized, trusted content and collaborate around the technologies you use most. c++ - How can I print a specific number of digits after The solution is to account for the internal error representation, by introducing a margin, e.g. What should be included in error messages? You can also cast it to an integer, but be warned y Uber in Germany (esp. What is the term for a thing instantiated by saying it? Handling char makes it so much easier to calculate such things. Now, let us assume that the input format double is imposed by your professor. 6 Answers. This first point to mention is that when coding, we are not manipulating such abstract things as numbers, are you asking for a fix to your code? 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 Though it's probably not necessarily, How to write 2 digits after decimal point in C++? [duplicate]. How to write 2 digits after decimal point in C++? [duplicate] How can one know the correct direction on a cloudy day? First item in an array is getting replaced? Setting decimal precision in C - GeeksforGeeks 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. 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. How to find digits after decimal? Trying to get whole and decimal part of a number into two variables. Not the answer you're looking for? However, clearly, it cannot work when the requested precision is higher than the internal precision. In this article, we have explained how to return two digits after decimal point using functions and implemented the technique in C Programming Language. 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. The problem is that floating point numbers are approximate. mr barmar you alright i found . Binary floating-point is designed to approximate real-number arithmetic. It is not designed to record information about decimal digits. If you want c - find sum of digits after decimal point - Stack Overflow [closed], desired behavior, a specific problem or error, and the shortest code necessary to reproduce the problem, docs.oracle.com/cd/E19957-01/806-3568/ncg_goldberg.html, How Bloombergs engineers built a culture of knowledge sharing, Making computer science more humane at Carnegie Mellon (ep. Difference between and in a sentence. Return two digit after decimal point in C - OpenGenus IQ Sorted by: 5. Did the ISS modules have Flight Termination Systems when they launched? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, The future of collective knowledge sharing, @Keith, good point. Teen builds a spaceship and gets stuck on Mars; "Girl Next Door" uses his prototype to rescue him and also gets stuck on Mars. For what purpose would a language allow zero-size structs? #include #include int main () { double d = Frozen core Stability Calculations in G09? It works for .123456789. It gives 100.00 on my system (well, it gives an error for a missing semicolon, but after I fixed that it works as I expect it). How AlphaDev improved sorting algorithms? A difficulty is that the internal error is multiplied by 10 when the number is multiplied by 10. Why do CRT TVs need a HSYNC pulse in signal? printf("Num = %f, intpart = %d, decpar Though this is not bad advise it will not solve OPs issue and I am not sure can be considered as a correct answer. 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. Quora Find centralized, trusted content and collaborate around the technologies you use most. { ". float fracPart; Why is my program slow when looping over exactly 8192 elements? Difference between and in a sentence, House Plant identification (Not bromeliad). 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. double integral; @hnefatl Kindly take a look at the end of my question, I added a code and it doesn't work. If we assume things like 1) sign only when negative, 2) no exponential 3) not infinity nor NAN, 4) no more than 15 significant digits 5) no more than 15 fraction digits --> then width will almost always*1 gives us what is needed to process num. 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. 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. EDIT: To determine number of digits after it's better solution to use int number_of_digits = string.size() - string.find_last_of('. Count number of digits after `.` in floating point numbers? '); The problem with "getting input in Teen builds a spaceship and gets stuck on Mars; "Girl Next Door" uses his prototype to rescue him and also gets stuck on Mars, input number specification as a string, e.g. What do gun control advocates mean when they say "Owning a gun makes you more likely to be a victim of a violent crime."? The inaccuracy is multiplied by 10 at each iteration. 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. 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. scanf("%f", &num); char buf [100]; if (fgets (buf, sizeof buf, stdin) == NULL) Handle_EOF (); char I want to find the sum of all the digits entered by a user after the decimal point in c. Eg. Canadian wildfire maps show where fires continue to burn across Using float the conversion will loose the number of decimals entered by user because of internal float representation. House Plant identification (Not bromeliad). How should I ask my new chair not to hire someone? c++ - Get decimal part of a number - Stack Overflow int i = 0; What do gun control advocates mean when they say "Owning a gun makes you more likely to be a victim of a violent crime."? Here is an example. So here is a non-real solution. 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. 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 c++ - Get the decimal point - Stack Overflow c++ - How to find digits after decimal? - Stack Overflow In this article, we have explained how to return last two digits of an Integer using functions and implemented the technique in C Programming Language. For example, int i = 0.999999 will give i = 0. fracPart = c - One digit after the decimal point in input - Stack Overflow 15.06 must return 6 Cologne and Frankfurt). You use the modf function: US Supreme Court rejects affirmative action in university For example, if the input number is 5412.921445, then the first two digits after decimal point are 92. Is relational comparison between int and float directly possible in C? How Bloombergs engineers built a culture of knowledge sharing, Making computer science more humane at Carnegie Mellon (ep. Connect and share knowledge within a single location that is structured and easy to search. I have read using fgets() which is safer than scanf(). You can surely edit that in yourself if you know about it, For input of .33333333333333333 (17 3s, total of digits 51), this prints Sum float 214. I want to write a program in C++ to cin a Decimal number and cout the digits after Decimal using printf(). With , you can use std::fixed and std::setprecision. In my benchmarks this approach is 2x faster than the approach posted by @hnefatl, en.cppreference.com/w/cpp/io/manip/setprecision, How Bloombergs engineers built a culture of knowledge sharing, Making computer science more humane at Carnegie Mellon (ep. can one explain me what is the problem of this code ? All three functions are used to remove digits after decimal point and return the modified decimal number. float, double and char* are all or can be all representations of numbers. width below is the number of non-white-space characters in input. Not the answer you're looking for? Idiom for someone acting extremely out of character. Many are reporting that showpoint should not be necessary And that's the case also for my system. rev2023.6.29.43520. Can the subdominant move to the tonic in simple functional harmony? What's the meaning (qualifications) of "machine" in GPL's "machine-readable source code"? int count = 0; Efficient way to find the sum of digits of an 8 digit number, finding sum of digits after decimal in a float till arbitary precision. float no = 2.3948; Is Logistic Regression a classification or prediction model? This can be done by atof. For example, below program sets the precision for 4 digits after the decimal point: In C, there is Show two digits after decimal point in c++ - Stack Overflow Was the phrase "The world is yours" used as an actual Pan American advertisement? Here is another way: Not the answer you're looking for? Do native English speakers regard bawl as an easy word? This prev House Plant identification (Not bromeliad). Difference between decimal, float and double in .NET? 585), Starting the Prompt Design Site: A New Home in our Stack Exchange Neighborhood, Temporary policy: Generative AI (e.g., ChatGPT) is banned, Displaying rounded off values instead of exact value in decimal in C++, Only two decimal places needed in to_string(price); written in c++11, Replacing a 32-bit loop counter with 64-bit introduces crazy performance deviations with _mm_popcnt_u64 on Intel CPUs. So to count the decimal digits in the specification, you have to store it as a string. rev2023.6.29.43520. WebUsing header file stdio.h you can easily do it as usual like c. before using %.2lf(set a specific number after % specifier.) why does music become less harmonic if we transpose it down to the extreme low end of the piano? Connect and share knowledge within a single location that is structured and easy to search. Is floating-point math consistent in C#? how to keep decimals in c - Stack Overflow Is it possible to count the number of digits after decimal @hnefatl I tried your answer and the compiler just hangs: Why not use std::modf, which is designed for this purpose: The non-fractional part of the value is in whole while the fractional part is in fractional. Really? 1960s? Closed 6 years ago. We recommend that you install all updates that apply to you. 1960s? c++ - Printing the correct number of decimal points with cout I found a code but it's not working for some numbers. Connect and share knowledge within a single location that is structured and easy to search. Find centralized, trusted content and collaborate around the technologies you use most. 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? like for 2.12 its giving output as 7 instead of 2 but for 2.125 I created a subroutine one using a double float, it returns 2 integer values. This is a very simple job. scan for the first period from the right, call this position P. scan for the maximum number of decimal digits from position P. What I tried: #include int main () { float n,m; int k; std::cin >> n; k = n; Not the answer you're looking for? Then we create a variable named answer to store the return type and then print it. So the value of epshas to be updated accordingly. Can one be Catholic while believing in the past Catholic Church, but not the present? Grappling and disarming - when and why (or why not)? Using header file stdio.h you can easily do it as usual like c. before using %.2lf(set a specific number after % specifier.) Making statements based on opinion; back them up with references or personal experience. c++ - Set the digits after decimal point - Stack Overflow Teen builds a spaceship and gets stuck on Mars; "Girl Next Door" uses his prototype to rescue him and also gets stuck on Mars. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. *1 IMO, code is not robust as the given limitation of not reading in as a string is not real for the real world. Therefore. for example 0.26547 -> 5. 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. using. It simply printf specific digits after decimal point.