Most voted "c" questions
C is a general-purpose computer programming language used for operating systems, games, and other high-performance jobs and is clearly distinct from C++. It was developed in 1972 by Dennis Ritchie for use with the UNIX operating system.
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answers159
viewsC function that checks whether the whole string is lowercase
I have to pass to the lowercase function a string and check if the elements of this string are lowercase, if they are must return true, if it is not must return false, however every time I run it…
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answer26
viewsError in my fgets can’t add data to it
I’m with a struct to receive data in char and float, but when will I enter data in the first char with fgets he won’t let me type and already jumps to my second fgets int ex22() { struct cadastro {…
casked 4 years, 5 months ago leofront06 11 -
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answer35
viewsDifficulty locating vector value in C
good night. I’ll be direct.. I’m an ADS student and I’m in my second semester.. I need to develop a rotating parking system. In this the user needs to insert the vehicle plate and we must assign to…
casked 4 years, 5 months ago Douglas Sant'Anna 1 -
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answer89
viewsBuffer Overflow
Good afternoon, folks, I’d like to request a hand on the college ATV; About this code used as an example: #include <stdio.h> #include <string.h> int main() { char…
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answer18
viewsI cannot print the array names received by the scanf, I need to print the 3 after the repetitions of the end
int main(void) { int i, idade; float peso, media_peso, media_idad; **char nome[3][11];** for(i=0 ; i < 3 ; i++) { printf("digite seu nome…
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answer41
viewsDynamic allocation and use of C pointers
I am very doubtful about the dynamic allocation and use of C pointers. I need to develop some exercises, but they are stuck because I am having some difficulty moving forward with the use of…
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answer61
viewsProblems with C files
Hey there, guys! I’m making a code for the records of patients who tested positive for COVID. When the patient is registered, their data is sent to a txt file. The problem occurs when a patient is…
casked 4 years, 4 months ago Lady Pavlichenko 11 -
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answer45
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viewsHelps in allocating memory for a struct
int main(){ setlocale(LC_ALL, ""); cout << sizeof(Livro); paragrafo(); int cont; Livro *livros; while(true){ int op; cout << "1) Maior de 3 números"; paragrafo(); cout << "2)…
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answer58
viewsHow do you transform a Class from c++ to c?
I’m needing to turn a code into c++ for c (I know, backward), I’ve already transformed the prototypes part of the functions, which would be the .h. file. c he calls this class separated with :: How…
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answer26
viewsChar in c problem
Good evening guys I’m here with a problem that automatically my value is read on IS() anyone know why this is happening? can’t find the error. if((con1 != 0) && (con2 != 0) && (con3…
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answer80
viewsHow to generate a file from a doubly chained list?
I could not in any way make my program save on file at the end. #include <stdio.h> #include <stdlib.h> #include <string.h> #include <locale.h> struct stNo { int info; char…
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answer52
viewsI don’t know what’s wrong with my show
In the exercise I need to create a struct for the registration of an address book, names, age and phones of five people, and define the appropriate registration structure, block diagram and…
casked 4 years, 3 months ago Tatiane Alves 1 -
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answer29
viewsProblems in displaying the result of a C function
Basically I’m making a function in C that takes two positive integers M and N and returns the sum of even numbers between these numbers. When I’m about to run, you show up to type in both numbers.…
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answer31
viewsHow to check if a data is already on my list
Well, I’m trying to do an activity, but I don’t understand the code very well, I would like to know how to check if a number is already on the list, as it is a new subject I’m half lost, as I should…
casked 4 years, 3 months ago caique santos 21 -
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answer89
viewsHow to compare elements of the same matrix
I am trying to solve an exercise involving the comparison of values of a matrix, ie if there are repeated elements, for example: the matrix 2x2 has the element A that repeats N times. Could someone…
casked 4 years, 2 months ago user221287 3 -
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answer31
viewsproblem with scope declaration
I am trying to make a code in which there must be the following data: age (in years), weight (in kg) and monthly income. and to calculate the average wage and percentage of people over 45 years of…
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answers106
viewsHangman game in C
Good evening, fellas, I hope you’re all right. The problem where I need help is a very simple code (hangman game), however, as I am new to programming and am learning C I am not identifying where…
casked 4 years, 2 months ago Kaue Almeida 7 -
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answer64
viewsHow to invert a vector in C?
I created a function to reverse vectors however when I run the program I do not see anything. This is my code for now: #include<stdio.h> #define DIMV 30 int lerIntPositivo(){ int numero; do{…
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answer36
viewsdisplacement of all values of the elements to the next position, last value must be in the first position
Good afternoon, can anyone help me develop that question? (c) rotation of the elements of the vector, with the displacement of all values of the elements for the next position, except the last…
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answer29
viewsprint out non-repeated values
good evening, I am developing a question, it is almost complete, being able to delete repeated values sequentially, for example: 1 1 2 3 4 5 1, as it excludes 1 and 1 and leaves only 2 3 4 5 1,…
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answer45
viewsPercentage calculation
Can anyone tell me if I’m calculating the right percentage? 13. Um dado é lançado 50 vezes, sendo anotado o valor correspondente a cada jogada. Faça um programa para: (a) anotar os valores de todas…
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answer30
viewsCould someone help me see where I’m wrong in my queue allocation
#include <stdio.h> #include <stdlib.h> typedef struct _fila { int ini; int fim; int tam; int *vetor; } Fila; Fila* criar_fila (int tamanho) { Fila* fila = (Fila *) malloc…
casked 4 years, 1 month ago RENAN NUNES AVILA 1 -
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answer37
viewsDoubts in a C exercise
I’m doing an exercise that asks: Write an algorithm that receives a 10-element A array and get an arrangement F whose components are the factorial components of the respective components of V. My…
casked 4 years, 1 month ago Matheus Moreira Maceno 11 -
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answer29
viewsHow to plot graphics and images . png in the same window with openGL and SDL
I have done some search, in manuals and such on google however I would like to know how to adapt my code below to plot a chart (line for example) along with a file image .png. I do not know where I…
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answer51
views"exited, floating point Exception" error in C
I solved this exercise but it keeps giving the error "exited, floating point Exception", I saw that this problem can be caused by division by zero... but I do not find the error, if anyone can help…
casked 4 years ago Julia Valente 7 -
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answer39
viewsHow to solve the c variable problem - string capacity, start to grow exponentially from the 3rd cycle
I’m having a problem, here with a program that aims to be a data entry routine, the problem in question, is the variable c that goes to the Cap function to ask the user the maximum capacity of the…
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answer27
viewsHow can I re-load a C program if I have set a wrong value or want to run the program several times
I’m doing a program in c that calculates the root of a function but sometimes I get the wrong values (e.g. 33.3333 instead of 3.333333) and I don’t want to run the program with the wrong values or…
casked 3 years, 12 months ago vitor horta 1 -
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answer29
viewsI’m not able to read strings with space and store them
#include <stdlib.h> struct dado_cidade { char cidade[20]; float taxa_2009; float taxa_2015; float indice_percent; } cidades[27]; int main () { FILE *dados; dados = fopen("dados_tabela.txt",…
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answer45
viewsIssue of matrices
Well, the question may be that for what Write an algorithm that reads an array A(5,2) and write it. Check, below, which elements of To are repeated and how many times each is repeated. Write each…
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answer49
viewsHow to access, within a function, the member of a dynamically allocated structure?
I have the following code in C: #include <stdio.h> #include <stdlib.h> struct pessoa{ char nome[11]; int idade; } void cadastra_pessoa(char novo_nome[11], int nova_idade, struct pessoa…
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answer32
viewsConsult by number, age of a student
I’m doing a program where I need to consult a student(structure) who has age, name, gender, student process number. To consult for the following paramaters below, put only a little code but I need…
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answer35
viewsPrepare a program to request 10 numbers. You must display the amount of negative, positive and zeros typed
I am trying to create a program in C which asks for 10 numbers. You must display the amount of negative, positive and typed zeros. I’ve tried it here but it’s not working. Reading from scratch is…
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answers109
viewsWhat does the computer do with 2 distinct values that need to be returned and are in the same memory scope?
I have this code with this single function, it performs the product between 'a' and 'b' that it receives from the "main" function. I would like to know how the function contained in this code deals…
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answer29
viewsProblems with assigning values from one vector to another, using malloc
I’m trying to make a program that reads a certain amount of values and inserts it into a vector that uses memory allocation. After that I created two more vectors (in the same way as the previous…
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answer24
viewsHow to pass string to struct within the function
Hi, I have to do a CRUD in C, but I have a problem, I have to pass 3 strings to a function but I have no idea how to do, I’ve tried everything... #include <stdio.h> #include <stdlib.h>…
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answer25
viewsMergesort Liguagem C
I’m doing a job for college and I’m having a little problem with my code because it’s the first time I’m having contact with Mergesort. I’m trying to make me exit it on the screen be kind of: Loja…
casked 3 years, 10 months ago Esley Loiola Martins 19 -
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answer30
viewsHow to create multiple objects from a struct having its user-defined values ( Pointers and Malloc)
Then, in the exercise I need to display at most 10 products with name, quantity and value entered by the user using the terminal and then display everything on the screen. But I only know how to…
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answer54
viewsProblem saving values to file . C-language CSV
Could someone please help me? I am starting the study in the C language and I have the code below that receives values in the struct variables and writes in a file . CSV, until there is ok. The…
casked 3 years, 10 months ago Marcos Prado 19 -
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answers53
viewsArray in C - How to print values from an Array
How can I take this information from the keyboard, name and value of three products, and print in table form the name with its value beside? I did so (code at the end), but at the moment appears the…
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answer54
viewsDoubt in the use of the for
I need to make a code to solve the following question: I have a basket with capacity C, I have 3 types of fruit, I will receive the amount one per line, to put all of them in the basket, the…
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answer27
viewsHow to clear a string for the previous value after using strcat()?
I’m using the function strcat() to concatenate string and I’m having trouble returning the string to the previous state, what I’ve tried so far is this, but with nothing successful: const char…
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answer31
viewsHow to read and print an entire word in C++
Well, I did this little c++ program for college. Now I don’t know how read on terminal and then print, there in the function prints, a whole word! Until then I was using the library <string>…
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answer42
viewsComing out of the while loop
I’m making a program that would be a board game that when all 4 players reach the house 100 the program to, however my code is not stopping at the 100: #include <locale.h> #include…
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answer36
viewsProgram stopping working in C
Hello, I am having a problem with a code of mine in C. It is a work for college and the code is simple, it is a script to receive data (users and products), sell the products and list existing…
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answer36
viewsProblem to link two structs in C
The program is about a bank, I need two structs (one of client and one of accounts), the account holder has to be linked with some client. But in the Add_account function, I am not able to make this…
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answers56
viewsOverload of error operator
The code below is with the following error: Error: [Error] invalid operands of types 'Ponteiro*' and 'Ponteiro*' to binary 'operator+' Code: #include <iostream> using namespace std; class…
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answer67
viewsWhy doesn’t my code make sense?
In my code, I have three "Cin" s that would be three questions to the user, for training of ifs. In this case, at the end we have if((cadastro == 1) && ((ativo == 1) || (logado == 1))){…
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answers42
viewsFunction. Language C
Good evening, I am doing a function exercise, where I type two numbers and choose which operation I want to do, 1 it applies the sum function and 2 the subtraction function, but my algorithm is not…
casked 3 years, 9 months ago Alan Ferreira 9 -
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answer29
viewsOutput in percentage by taking into account user inputs
The program asks the sex of the user, then I asked for the opinion about a certain product( yes or no). As a way out, he should give me the total of people who gave yes and no, then the percentage…