C，从文件读入数组，按数字编号

Question

void readfromFile() {

    FILE *myFile;
    myFile = fopen("matrikel.txt", "r");

    //read file into array
    int numberArray[12];
    int i;

    if (myFile == NULL) {
        printf("Error Reading File\n");
        exit (0);
    }

    for (i = 0; i < 12; i++) {
        fscanf(myFile, "%d,", &numberArray[i] );
    }

    for (i = 0; i < 1; i++) {
        printf("Number is: %d\n\n", numberArray[i]);
    }

    fclose(myFile);
}

"matrikel.txt" contains

808098822790 

The number seems to be too long for the int numberArray[12] , when running the code it prints a random number. When cutting some of the single integers from the end of the number it works, the maximum length seems to be 9.

I'm not quite sure but shouldn't the fscanf in the first for loop print one single digit number into each cell of numberArray[] ?

Answer 1

A format specifier for scanf follows this prototype: %[*][width][length]specifier So, with %1d you will read a single number each time. But would be more simple to read each number as a char with fgetc(myFile);

 for (i = 0; i < 12; i++) {
     int c = fgetc(myFile);
     if(c == EOF)
        break;
     numberArray[i] = c - '0';
 }