Compilare: user.c: In function ‘main’: user.c:15:7: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(str, sizeof(char), 100, f); ^ user.c:25:10: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(str, sizeof(char), 100, f); ^ user.c:40:10: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(str, sizeof(char), 100, f); ^ user.c:53:10: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(str, sizeof(char), 100, f); ^ user.c:66:7: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(str, sizeof(char), 100, f); ^ user.c:73:13: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(str, sizeof(char), 100, f); ^ user.c:80:22: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(str, sizeof(char), 100, f); ^ user.c:90:11: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(str, sizeof(char), 100, f); ^ user.c:103:11: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(str, sizeof(char), 100, f); ^ user.c:115:10: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(str, sizeof(char), 100, f); ^ user.c:125:11: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(str, sizeof(char), 100, f); ^ In file included from /usr/include/stdio.h:934:0, from user.c:1: In function ‘fread’, inlined from ‘main’ at user.c:40:10: /usr/include/i386-linux-gnu/bits/stdio2.h:285:2: warning: call to ‘__fread_chk_warn’ declared with attribute warning: fread called with bigger size * nmemb than length of destination buffer [enabled by default] return __fread_chk_warn (__ptr, __bos0 (__ptr), __size, __n, __stream); ^ In function ‘fread’, inlined from ‘main’ at user.c:53:10: /usr/include/i386-linux-gnu/bits/stdio2.h:285:2: warning: call to ‘__fread_chk_warn’ declared with attribute warning: fread called with bigger size * nmemb than length of destination buffer [enabled by default] return __fread_chk_warn (__ptr, __bos0 (__ptr), __size, __n, __stream); ^ In function ‘fread’, inlined from ‘main’ at user.c:80:22: /usr/include/i386-linux-gnu/bits/stdio2.h:285:2: warning: call to ‘__fread_chk_warn’ declared with attribute warning: fread called with bigger size * nmemb than length of destination buffer [enabled by default] return __fread_chk_warn (__ptr, __bos0 (__ptr), __size, __n, __stream);