Compilare: user.cpp: In function ‘int main()’: user.cpp:76:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<c[linie-1].size(); i++) ^ user.cpp:100:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<c[i].size(); j++) ^ user.cpp:42:8: warning: unused variable ‘j’ [-Wunused-variable] int i,j,x,y,ok=0; ^ In file included from /usr/include/string.h:642:0, from user.cpp:4: In function ‘void* memset(void*, int, size_t)’, inlined from ‘int main()’ at user.cpp:74:19: /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 (); ^ In function ‘void* memset(void*, int, size_t)’, inlined from ‘int main()’ at user.cpp:75:20: /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/ccEc6hsq.o: In function `main': user.cpp:(.text.startup+0x34a): warning: memset used with constant zero length parameter; this could be due to transposed parameters