c++ - why can't I use clock_t in codeblocks 12.11 compiler? -


i trying compile code in codeblocks showing error.
code was: 

#include<iostream> #include<cstdio> #include<cstdlib> #include<ctime> #include<iostream> using namespace std; void f() {    int sum=0;    for(int i=0;i<100000000;i++)        sum++; } int main() {    clock_t start,end;    start=clock();    f();    end=clock();    cout<<((double)end-start)/clocks_per_sec<<endl; }

but showing error, error that:
" #error file requires compiler , library support iso c++ 2011 standard. support experimental, , must enabled -std=c++11 or -std=gnu++11 compiler options."
now?

as suggested error, enable c++11 feature. (thanks @chris' comment) :

it's right in settings. there's literally option says "use c++11 standard".


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