So I have this program where it asks the user for a filename to read, and a filename to save the output to. This program basically counts the frequency of a letter inside the txt file. Here is the program...
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
int main(void)
{
char letter[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ", FileName[50], SaveFile[50], print[256], stry[50], scount[50], point;
int i, j, count = 0;
FILE * readFile, *saveFile;
printf("Enter a file to read: ");
gets(FileName);
printf("Enter a filename to save results: ");
gets(SaveFile);
printf("Letter Frequency\n\n");
saveFile = fopen(SaveFile, "wb");
for(i = 0; i <= strlen(letter)-1; i++)
{
readFile = fopen(FileName, "r");
while(!feof(readFile))
{
fgets(print, 256, readFile);
for(j = 0; j <= strlen(print); j++)
{
if(toupper(print[j]) == toupper(letter[i]))
{
count++;
}
}
point = letter[i];
stry[0] = point;
sprintf(scount, "%d", count);
if(feof(readFile) && count > 0)
{
printf("%s %d\n", stry, count);
fprintf(saveFile, stry);
fprintf(saveFile, " ");
fprintf(saveFile, scount);
fprintf(saveFile, "\n");
}
}
count = 0;
}
fclose(readFile);
return 0;
}
I input a txt file named readme.txt that I modified. It contains
aaa
bbb
ccc
ddd
But when I run it, and used readme.txt to be read, the output is
A 3
B 3
C 3
D 6
The frequency of letter D must be only 3. I further modified the content of the readme.txt file, and figured out that value of the variable count is doubled when reading the last line. For example, the content of the txt file is
hello mama
hihihi
maria maria
woohoo
the output will be
A 6
E 1
H 6
I 5
L 2
M 4
O 9
R 2
W 2
I read my program so many times already, and I still can't find my wrong doings. I hope you can help me fix this problem. Your help will be very much appreciated!
EDIT:
This is what my code looks like after making the changes that were recommended in the comments section:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
int main(void)
{
char letter[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ", FileName[50], SaveFile[50], print[256], stry[50], scount[50], point;
int i, j, count = 0;
FILE * readFile, *saveFile;
printf("Enter a file to read: ");
gets(FileName);
printf("Enter a filename to save results: ");
gets(SaveFile);
printf("Letter Frequency\n\n");
saveFile = fopen(SaveFile, "wb");
for(i = 0; i < strlen(letter); i++){
readFile = fopen(FileName, "r");
while(fgets(print, 256, readFile) != NULL)
{
fgets(print, 256, readFile);
for(j = 0; j <= strlen(print); j++)
{
if(toupper(print[j]) == toupper(letter[i]))
{
count++;
}
}
point = letter[i];
stry[0] = point;
sprintf(scount, "%d", count);
if(feof(readFile) && count > 0)
{
printf("%s %d\n", stry, count);
fprintf(saveFile, stry);
fprintf(saveFile, " ");
fprintf(saveFile, scount);
fprintf(saveFile, "\n");
}
}
count = 0;
}
fclose(readFile);
return 0;
}
Related
So I'm having this file myFile.txt with the following numbers in it: 1 2 3 4 5 6 7 8 9 0 2 3 4 5 6 6 5 4 3 2 1. I'm trying to write a program that calculates how many times a number from 0 to 9 is repeated, so it would be printed out like that Number %d repeats %d times. Right now I'm stuck at printing out the n number of elements of that file, so in example, if I would like to calculate how many times the 15 first numbers repeat themselves, firstly I would print out those 15 numbers, then the number of times each number repeats. But when I'm trying to print out those 15 numbers, it prints me this: 7914880640-10419997104210821064219560-1975428800327666414848.
Here's the code:
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
int main() {
FILE *fp;
fp = fopen("myFile.txt", "r");
char c;
int n, i, count = 0;
for (c = getc(fp); c != EOF; c = getc(fp)) {
if (!(c == ' '|| c == '\n'))
count = count + 1;
}
printf("The amount of numbers is:%d\nTill which element of the list would you like to count the amount of the each element: \n", count);
scanf("%d", &n);
int a[n];
if (n <= count) {
for (i = 0; i < n; i++) {
fscanf(fp, "%d", &a[i]);
}
for (i = 0; i < n; i++) {
printf("%d", a[i]);
}
} else {
printf("Error");
}
fclose(fp);
return 0;
}
That's the final solution.
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
int count_occur(int a[], char exist[], int num_elements, int value)
{
int i, count = 0;
for (i = 0; i<num_elements; i++)
{
if (a[i] == value)
{
if (exist[i] != 0)
return 0;
++count;
}
}
return(count);
}
int main()
{
int a[100],track[10];
FILE *fp;
fp = fopen("myFile.txt", "r");
char c,exist[20]= {0};
int n,i,num,count=0,k=0,eval;
for (c = getc(fp); c != EOF; c=getc(fp))
{
if (!(c==' '|| c=='\n'))
count=count+1;
}
rewind(fp);
printf("The amount of numbers is:%d\nTill which element of the list would you like to count the amount of the each element: \n", count);
scanf("%d", &n);
if (n<=count)
{
while(fscanf(fp, "%d", &num) == 1)
{
a[k] = num;
k++;
}
for (i=0; i<n; i++)
{
printf("%d ", a[i]);
}
}
else
{
printf("Error");
}
fclose(fp);
if (n<=count)
{
for (i = 0; i<n; i++)
{
eval = count_occur(a, exist, n, a[i]);
if (eval)
{
exist[i]=1;
printf("\nNumber %d was found %d times\n", a[i], eval);
}
}
}
return 0;
}
I am new to C programming and I am getting a THREAD 1: EXC_BAD_ACCESS(code = 1, address 0x68)
when I run my program. The purpose of my code is to read from a txt file that contains positive and negative numbers and do something with it.
#include <stdio.h>
int main (int argc, const char * argv[]) {
FILE *file = fopen("data.txt", "r");
int array[100];
int i = 0;
int num;
while( fscanf(file, "%d" , &num) == 1) { // I RECEIVE THE ERROR HERE
array[i] = num;
printf("%d", array[i]);
i++;
}
fclose(file);
for(int j = 0; j < sizeof(array); j++){
printf("%d", array[j]);
}
}
After
FILE *file = fopen("data.txt", "r");
Say
if(file == 0) {
perror("fopen");
exit(1);
}
Just a guess, the rest of the code looks ok, so likely this is the problem.
Also worth noting that you might have more than 100 numbers in your file, in which case you will blow past the size of your array. Try replacing the while loop with this code:
for (int i = 0; i < 100 && ( fscanf(file, "%d" , &num) == 1); ++i)
{
array[i] = num;
printf("%d", array[i]);
}
Do you have the file "data.txt" created and local?
touch data.txt
echo 111 222 333 444 555 > data.txt
Check that your file open succeeded.
Here is a working version,
#include <stdio.h>
#include <stdlib.h> //for exit
int main (int argc, const char * argv[])
{
FILE *fh; //reminder that you have a file handle, not a file name
if( ! (fh= fopen("data.txt", "r") ) )
{
printf("open %s failed\n", "data.txt"); exit(1);
}
int array[100];
int idx = 0; //never use 'i', too hard to find
int num;
while( fscanf(fh, "%d" , &num) == 1) { // I RECEIVE THE ERROR HERE
array[idx] = num;
printf("%d,", array[idx]);
idx++;
}
printf("\n");
fclose(fh);
//you only have idx numbers (0..idx-1)
int jdx;
for(jdx = 0; jdx<idx; jdx++)
{
printf("%d,", array[jdx]);
}
printf("\n");
}
I tried to read a file containing an empty box of '*', the error message doesn't get printed, so the file is opened, but the scan doesn't work. I tried to print the count variable, and the value of count is 0. I don't really know where the fault is. Please help... Thanks
the file content that I want to read
int openmap(int file_no){
char filename[32];
char mapp[100][100];
int number;
int count;
int x[100];
int nomor = 1;
for(int i = 1; i <= file_no; i++){
sprintf(filename, "map%d.txt", i);
FILE *test = fopen(filename,"r");
if(test)
{
printf("%2d. Map %d\n", nomor, i);
x[nomor-1] = i;
nomor++;
fclose(test);
}else if(!test && i > file_no){
printf("No map available!");
return 1;
}
}
do{
printf("[0 to cancel] [1 - %d]>> ", nomor-1);
scanf("%d", &number);
}while(number < 0 || number > file_no);
if(number > 0){
sprintf(filename,"map%d.txt", x[number-1]);
printf("%s", filename);
FILE *open = fopen(filename, "r");
if(!open){
printf("error");
}
while(!feof){
fscanf(open, "%[^\n]\n", mapp[count]);
count++;
}
fclose(open);
for(int i = 0; i < count ; i++){
printf("%s\n", mapp[i]);
}
}
}
I created a small test program:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
void main () {
char mapp[100][100];
int i, count = 0;
char filename[32];
sprintf(filename, "test.txt");
FILE *open = fopen(filename, "r");
if(!open){
printf("error");
}
while(!feof(open)){
fscanf(open, "%[^\n]\n", mapp[count]);
count++;
}
fclose(open);
for(i = 0; i < count ; i++){
printf("%s\n", mapp[i]);
}
}
as far as i can see the only issue you have regarding the relevant section is your while loop condition, you should use: while(!feof(open)) - i tested my solution and it works so it seems that this is the only issue in your solution
Complete task:
Write a program that reads from a text file 10 integer numbers. The
file has to be previously created using a different code or by using
the operating system’s facilities. Write the functions that:
- order the integers array in ascending/descending order and displays the result
- count the number of even numbers in the array and display the result
My code:
#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <conio.h>
#include <string>
void cresc(int citire[20]);
FILE *fpointer;
void main()
{
char fisier[12];
int i,citire[20];
printf("Dati un nume fisierului:");
scanf("%s", &fisier);
strcat(fisier, ".txt");
fpointer = fopen(fisier, "w");
fprintf(fpointer, "9865742031");
fclose(fpointer);
fpointer = fopen(fisier, "r");
for (i = 0;i < 9;i++)
fscanf(fpointer, "%d", &citire[i]);
fclose(fpointer);
fpointer = fopen(fisier, "a+");
fprintf(fpointer,"\nNumerele puse in ordine sunt: \n");
cresc(citire);
fclose(fpointer);
_getch();
}
void cresc(int citire[20])
{
int i,temp;
for (i = 0;i < 9; i++)
{
if (citire[i] > citire[i + 1])
{
temp = citire[i];
citire[i] = citire[i + 1];
citire[i + 1] = temp;
}
fprintf(fpointer, "%d", citire[i]);
}
}
Can someone help me?
I manage to solve it, thanks for your help guys.
Here is the problem solved, if someone will need it.
#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <conio.h>
#include <string>
FILE *fpointer;
void cit(int citire[10]);
int paritate(int citire[10]);
void main()
{
char fisier[12];
int i, citire[10], trecere[10], nrpar;
printf("Dati un nume fisierului:");
scanf("%s", &fisier);
strcat(fisier, ".txt");
fpointer = fopen(fisier, "w");
fprintf(fpointer, "9 8 6 5 7 4 2 0 3 1");
fclose(fpointer);
fpointer = fopen(fisier, "r");
for (i = 0;i < 10;i++)
fscanf(fpointer, "%d", &citire[i]);
fclose(fpointer);
fpointer = fopen(fisier, "a");
fprintf(fpointer, "\nNumerele puse in ordine sunt: \n");
cit(citire);
nrpar = paritate(citire);
fprintf(fpointer, "\n\nSunt %d numere pare", nrpar);
fclose(fpointer);
_getch();
}
void cit(int citire[10])
{
int i,j, temp;
for (i = 0;i < 10; i++)
{
for (j = 0;j<9;j++)
if (citire[j] > citire[j + 1])
{
temp = citire[j];
citire[j] = citire[j + 1]; //9 8 6 5 7 4 2 0 3 1
citire[j + 1] = temp; //buble sort
}
}
for (i = 0;i < 10; i++)
fprintf(fpointer, " %d", citire[i]);
}
int paritate(int citire[10])
{
int i, par=0;
for (i = 0;i < 10; i++)
if (citire[i] % 2 == 0)
par ++;
return par;
}
You wright a string representing a single value to the file, you then read 9 integers from the file but there is a single value. You need to separate the values with a non numerical character, like this
fprintf(fpointer, "9 8 6 5 7 4 2 0 3 1");
and then to read, do this instead
while ((i < 9) && (fscanf(fpointer, "%d", &citire[i]) == 1))
++i;
Fix your cresc() function to make it take the number of elements as a parameter
void cresc(int *citire, int count);
and the for loop
for (i = 0 ; i < count ; ++i)
In your main() call cesc() like this
cresc(citere, i);
I am new to C programming and I am getting a THREAD 1: EXC_BAD_ACCESS(code = 1, address 0x68)
when I run my program. The purpose of my code is to read from a txt file that contains positive and negative numbers and do something with it.
#include <stdio.h>
int main (int argc, const char * argv[]) {
FILE *file = fopen("data.txt", "r");
int array[100];
int i = 0;
int num;
while( fscanf(file, "%d" , &num) == 1) { // I RECEIVE THE ERROR HERE
array[i] = num;
printf("%d", array[i]);
i++;
}
fclose(file);
for(int j = 0; j < sizeof(array); j++){
printf("%d", array[j]);
}
}
After
FILE *file = fopen("data.txt", "r");
Say
if(file == 0) {
perror("fopen");
exit(1);
}
Just a guess, the rest of the code looks ok, so likely this is the problem.
Also worth noting that you might have more than 100 numbers in your file, in which case you will blow past the size of your array. Try replacing the while loop with this code:
for (int i = 0; i < 100 && ( fscanf(file, "%d" , &num) == 1); ++i)
{
array[i] = num;
printf("%d", array[i]);
}
Do you have the file "data.txt" created and local?
touch data.txt
echo 111 222 333 444 555 > data.txt
Check that your file open succeeded.
Here is a working version,
#include <stdio.h>
#include <stdlib.h> //for exit
int main (int argc, const char * argv[])
{
FILE *fh; //reminder that you have a file handle, not a file name
if( ! (fh= fopen("data.txt", "r") ) )
{
printf("open %s failed\n", "data.txt"); exit(1);
}
int array[100];
int idx = 0; //never use 'i', too hard to find
int num;
while( fscanf(fh, "%d" , &num) == 1) { // I RECEIVE THE ERROR HERE
array[idx] = num;
printf("%d,", array[idx]);
idx++;
}
printf("\n");
fclose(fh);
//you only have idx numbers (0..idx-1)
int jdx;
for(jdx = 0; jdx<idx; jdx++)
{
printf("%d,", array[jdx]);
}
printf("\n");
}