Compilare: user.cpp: In function ‘int main()’: user.cpp:40:17: warning: unused variable ‘val’ [-Wunused-variable] int i,j,n,m,val,e,x; ^ user.cpp: In function ‘char nextch()’: user.cpp:9:29: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf,1,MAXBUF,fi); ^ user.cpp: In function ‘int main()’: user.cpp:91:28: warning: ‘val’ may be used uninitialized in this function [-Wmaybe-uninitialized] sol[Q[i].poz]=val; ^ user.cpp:68:28: warning: ‘val’ may be used uninitialized in this function [-Wmaybe-uninitialized] sol[Q[i].poz]=val; ^