运行 ID: 65598

Main.cc: In function ‘int main()’:
Main.cc:6:8: warning: comparison of constant ‘5’ with boolean expression is always true [-Wbool-compare]
 if(0<=x<5){
    ~~~~^~
Main.cc:6:5: warning: comparisons like ‘X<=Y<=Z’ do not have their mathematical meaning [-Wparentheses]
 if(0<=x<5){
    ~^~~
Main.cc:7:14: error: ‘setprecision’ was not declared in this scope
 cout<