Compilare: user.cpp: In function ‘void tr(char)’: user.cpp:43:41: warning: operation on ‘vg’ may be undefined [-Wsequence-point] if(op=='+') {t[vg-1]=t[vg-1]+t[vg--];}else ^ user.cpp:43:41: warning: operation on ‘vg’ may be undefined [-Wsequence-point] user.cpp:44:41: warning: operation on ‘vg’ may be undefined [-Wsequence-point] if(op=='-') {t[vg-1]=t[vg-1]-t[vg--];}else ^ user.cpp:44:41: warning: operation on ‘vg’ may be undefined [-Wsequence-point] user.cpp:47:36: warning: operation on ‘vg’ may be undefined [-Wsequence-point] t[vg-1]=t[vg-1]*t[vg--]; ^ user.cpp:47:36: warning: operation on ‘vg’ may be undefined [-Wsequence-point] user.cpp:51:41: warning: operation on ‘vg’ may be undefined [-Wsequence-point] if(op=='/') {t[vg-1]=t[vg-1]/t[vg--];} ^ user.cpp:51:41: warning: operation on ‘vg’ may be undefined [-Wsequence-point] user.cpp: In function ‘int mdf(int)’: user.cpp:71:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (b[x][k]>='0' && b[x][k]<='9') ^ user.cpp:71:39: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (b[x][k]>='0' && b[x][k]<='9') ^ user.cpp:72:31: warning: array subscript has type ‘char’ [-Wchar-subscripts] t[++vg]=b[x][k]-'0'; ^ user.cpp:75:35: warning: array subscript has type ‘char’ [-Wchar-subscripts] t[++vg]=mre[b[x][k]]; ^ user.cpp:75:36: warning: array subscript has type ‘char’ [-Wchar-subscripts] t[++vg]=mre[b[x][k]]; ^ user.cpp:99:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (vlr[k]>vlr[op]) ^ user.cpp:99:30: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (vlr[k]>vlr[op]) ^ user.cpp: In function ‘int rez(int)’: user.cpp:140:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] k=(v[k]+'0'); ^ user.cpp: In function ‘int main()’: user.cpp:209:12: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[k]=x; ^ user.cpp:227:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] strcpy(a[k]+1,xp+pz); ^