Compilare: main.cpp: In function 'int main()': main.cpp:40:34: warning: unused variable 'rez2' [-Wunused-variable] int n,m,i,j,x,rez,nr,c1,c2,p,rez2,nr2,k; ^~~~ main.cpp:40:39: warning: unused variable 'nr2' [-Wunused-variable] int n,m,i,j,x,rez,nr,c1,c2,p,rez2,nr2,k; ^~~ main.cpp:40:43: warning: unused variable 'k' [-Wunused-variable] int n,m,i,j,x,rez,nr,c1,c2,p,rez2,nr2,k; ^ main.cpp:54:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("peri.in","r",stdin); ^ main.cpp:55:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("peri.out","w",stdout); ^ main.cpp: In function 'char getChar()': main.cpp:16:28: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(BUF,LIM,1,stdin); ^