Hello, the following program demonstrates file opening, file pointer judgment, data reading and file closing. The program debugging has passed, and I hope it will be helpful to you!

# include & ltstdio.h & gt

Master ()

{

FILE * fp

int i，j，a[ 10]；

If ((FP = fopen ("data.txt ","r+b")) = = null) {/* Open the data file data.txt */

Printf ("Unable to open file. \ n ")；

Exit (0);

}

I = 0；

while(feof(FP)= = 0 & amp； & amp & lt80){ /* Read integers one by one until the end of the file or more than 80 integers */

j=fscanf(fp，" %d "，& ampa[i++])；

}

fclose(FP)； /* Close file pointer */

Printf ("data is: \ n");

for(j = 0； j & ltI- 1； j++) printf("%d "，a[j])； /* Output the read data to the screen */

}