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Display the size of a file in C

#include <stdio.h> #include <io.h> #include <fcntl.h> #include <sys\stat.h> int main() { int fp; long file_size; if ((fp = open("f:/cprojects/urls.txt", O_RDONLY)) == -1) printf("Error opening the file \n"); else { file_size = filelength(file_handle); printf("The file size in bytes is %ld\n", file_size); close(fp); } return 0; }