How to find EOF through fscanf

Question

I am reading matrix through file with the help of fscanf    How can i find EOF  Even if i try to find EOF after every string caught in arr   then also i am not able to find it   with the help of count i am reading the input file   -12 23 3  1 2 4  int main         char arr 10  len      int count 0       FILE  input  fopen  input txt    r         while count  7                      fscanf input   s  arr               storing the value of arr in some array                     len strlen arr              count                if arr len 1   EOF             printf   ni caught it n     here we have to exit        return 0      Instead of count i want to exit through the loop with the EOF   how can it be solved

User · Answer

If you have integers in your file fscanf returns 1 until integer occurs. For example:

FILE *in = fopen("./task.in", "r");
int length = 0;
int counter;
int sequence;

for ( int i = 0; i < 10; i++ ) {
    counter = fscanf(in, "%d", &sequence);
    if ( counter == 1 ) {
        length += 1;
    }
}

To find out the end of the file with symbols you can use EOF. For example:

char symbol;
FILE *in = fopen("./task.in", "r");

for ( ; fscanf(in, "%c", &symbol) != EOF; ) {
    printf("%c", symbol); 
}

User · Answer

while  fscanf input   s  arr     EOF  amp  amp  count  7      len strlen arr      count

User · Answer

fscanf -  On success  the function returns the number of items successfully read  This count can match the expected number of readings or be less -even zero- in the case of a matching failure  In the case of an input failure before any data could be successfully read  EOF is returned    So  instead of doing nothing with the return value like you are right now  you can check to see if it is    EOF   You should check for EOF when you call fscanf  not check the array slot for EOF

[c] How to find EOF through fscanf?

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