/in/foo.cc: In function 'int main()':
/in/foo.cc:6:16: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   if(str[0]='R') cout<<"Paper"<<endl;
                ^
/in/foo.cc:7:22: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   else if (str[0]='P') cout<<"Scissors"<<endl;
                      ^
/in/foo.cc:8:22: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   else if (str[0]='S') cout<<"Rock"<<endl;
                      ^