Compilare: user.cpp: In function ‘int main()’: user.cpp:31:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("expresie2.in","r",stdin); ^ user.cpp:32:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("expresie2.out","w",stdout); ^ user.cpp:36:12: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s); ^ user.cpp:24:22: warning: ‘cnt’ may be used uninitialized in this function [-Wmaybe-uninitialized] sort(&v[1],&v[cnt+1]); ^ user.cpp:34:13: note: ‘cnt’ was declared here int k=0,cnt,q,suma=0,i,nr,numere=0; ^ /tmp/ccqUIMHj.o: In function `main': user.cpp:(.text.startup+0x56): warning: the `gets' function is dangerous and should not be used.