Thread: How store sorted values in a text file after using Bubble sort?

I'm trying to create a program that reads a file, sort the values in ascending order using bubble sort and then update the file with the new sorted values. When I ran the code it prints the sorted values, but the text file is blank. I'm new to this type of programming technique and any help would be appreciated.

Code:

void bubbleSort(int myArray[]);


int main(){


    FILE *fptr;
    char ptr[1000] = "numbers.txt";
    int myArray[500];
    int i;


    fptr = fopen(ptr,"r");
    if (fptr == NULL){
        printf("Error Reading File\n");
        exit(0);
    }


    for (i = 0; i < 7; i++){
        fscanf(fptr, "%d,", &myArray[i]);
    }


    for (i = 0; i < 7; i++){
        printf("Number: %d\n", myArray[i]);
    }


    printf("\n");
    bubbleSort(myArray);
    for (i = 0; i < 7; i++){
        printf("Sorted numbers: %d\n", myArray[i]);
        fptr = fopen(ptr,"w");
    }


    fclose(fptr);


    return 0;
}


void bubbleSort(int myArray[]){
    int i, j, temp;
    for(i = 0; i < 7 - 1; i++){
        for(j = 0; j < 7 - 1; j++){
            if (myArray[j] > myArray[j+1]){
                temp = myArray[j];
                myArray[j] = myArray[j+1];
                myArray[j+1] = temp;
            }
        }
    }
}

> Enable GingerCannot connect to Ginger Check your internet connection
Please turn this crap off.

> fptr = fopen(ptr,"w");
1. You only need to do this once.
2. You need close the file for reading, before you open it for writing.
3. Look how you used fscanf - now do the same using fprintf.