Compilare: user.cpp: In function ‘int main()’: user.cpp:16:7: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] fin>>s+1; ^ user.cpp:47:65: warning: operation on ‘vf1’ may be undefined [-Wsequence-point] od[--vf1]=calcul(od[vf1+1],od[vf1],op[vf--]); ^ user.cpp:47:65: warning: operation on ‘vf1’ may be undefined [-Wsequence-point] user.cpp:56:65: warning: operation on ‘vf1’ may be undefined [-Wsequence-point] od[--vf1]=calcul(od[vf1+1],od[vf1],op[vf--]); ^ user.cpp:56:65: warning: operation on ‘vf1’ may be undefined [-Wsequence-point]