Compilare: user.cpp: In function ‘int main()’: user.cpp:38:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d%d",&n,&k,&nr); ^ user.cpp:40:18: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&d); ^ user.cpp:41:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(j=1;j<=d;j++) {fscanf(f,"%d",&y); ^ In file included from /usr/include/string.h:642:0, from user.cpp:2: In function ‘void* memset(void*, int, size_t)’, inlined from ‘int verifsol()’ at user.cpp:10:26: /usr/include/i386-linux-gnu/bits/string3.h:82:32: warning: call to ‘__warn_memset_zero_len’ declared with attribute warning: memset used with constant zero length parameter; this could be due to transposed parameters [enabled by default] __warn_memset_zero_len (); ^ /tmp/ccD9Cjm9.o: In function `verifsol()': user.cpp:(.text+0x8): warning: memset used with constant zero length parameter; this could be due to transposed parameters