Compilare: user.cpp: In function ‘int main()’: user.cpp:18:11: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] fin>>s+1; ^ user.cpp:37:71: warning: operation on ‘vf1’ may be undefined [-Wsequence-point] od[--vf1]=calcul(od[vf1],od[vf1+1],op[vf]); ^ user.cpp:37:71: warning: operation on ‘vf1’ may be undefined [-Wsequence-point] user.cpp:50:67: warning: operation on ‘vf1’ may be undefined [-Wsequence-point] od[--vf1]=calcul(od[vf1],od[vf1+1],op[vf]); ^ user.cpp:50:67: warning: operation on ‘vf1’ may be undefined [-Wsequence-point]