Compilare: main.c: In function 'main': main.c:41:18: warning: assignment makes integer from pointer without a cast [-Wint-conversion] buffer[4096] = NULL; ^ main.c:56:13: warning: implicit declaration of function 'strncpy' [-Wimplicit-function-declaration] strncpy( out_buffer[ !curr_buffer], out_buffer[ curr_buffer], out_count); ^~~~~~~ main.c:56:13: warning: incompatible implicit declaration of built-in function 'strncpy' main.c:56:13: note: include '<string.h>' or provide a declaration of 'strncpy' main.c: In function 'getint': main.c:9:13: warning: ignoring return value of 'fread', declared with attribute warn_unused_result [-Wunused-result] fread( buffer, 1, buffer_size, fin); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~