Reading numbers from text and order the numbers - c

Question

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;
}

Answer 1

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);