Compilare: main.cpp: In function 'int main()': main.cpp:27:104: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("evaluare.in","r",stdin),freopen("evaluare.out","w",stdout),scanf("%s",s),printf("%d",E(0)); ^ main.cpp:27:104: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] main.cpp:27:104: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] main.cpp: In function 'int E(int)': main.cpp:16:22: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized] p++,y=x+E(l+1); ~^~~~~~~~~ main.cpp:16:22: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized] p++,y=x+E(l+1); ~^~~~~~~~~ main.cpp:16:22: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized] p++,y=x+E(l+1); ~^~~~~~~~~ main.cpp:16:22: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized] p++,y=x+E(l+1); ~^~~~~~~~~ main.cpp:18:22: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized] p++,y=x-E(l+1); ~^~~~~~~~~