Compilare: main.cpp: In function 'int main()': main.cpp:36:9: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if(c[n][i]>0) if(r=='0') {p=a,a=(a+u)/2;goto x;} ^ main.cpp:40:8: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if(!f) if(r=='0') {u=a,a=(a+p)/2;goto x;} ^ main.cpp:43:22: warning: 'w' may be used uninitialized in this function [-Wmaybe-uninitialized] fout<<w<<' '<<w-s; ^