Error: the global scope has no "clock"

Question

I want use clock function in my program so I am referring to how to use clock().

My code :

#include <iostream>
#include <cstdio>
#include <ctime>

int main() {
    std::clock_t start;
    //clock_t start;  
    double duration;

    start = std::clock();
    //start = clock(); //This Also not working

    /* Your algorithm here */

    duration = ( std::clock() - start ) / (double) CLOCKS_PER_SEC;
    //duration = ( clock() - start ) / (double) CLOCKS_PER_SEC;

    std::cout<<"printf: "<< duration <<'\n';
}

But still I am having compilation errors

error C2039: 'clock' : is not a member of '`global namespace'' ....\ctime
error C2873: 'clock' : symbol cannot be used in a using-declaration ....\ctime
error C3861: 'clock': identifier not found ....\main.cpp

So I have checked ctime header file by opening in visual studio in that also

using _CSTD asctime; using _CSTD clock; using _CSTD ctime;

for this line it's gives an error

Error: the global scope has no "clock"

Please help me to solve these errors?

Assuming these are the **first** error messages, you'll have to conclude that something very nasty happened to your `time.h` header file. Or the .h files that it #includes. You'll have to get your machine fixed, spin the repair/reinstall wheel of fortune. — Hans Passant, Mar 31 '16 at 08:19
give errors messages with info about place in the code where they happened (file and line) — nikniknik2016, Mar 31 '16 at 08:28
Is all that code in `main()` required to demonstrate the problem? — Ulrich Eckhardt, Mar 31 '16 at 08:31
Have you checked and rechecked that there is not an #include in somewhere? Eh? — Loreto, Mar 31 '16 at 08:53
using VS-2013 and I have this small code only and i don't have time.h somewhere. — Mohan, Mar 31 '16 at 09:26
Path of ctime is ...C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\include — Mohan, Mar 31 '16 at 09:29

score 0 · Accepted Answer · answered Mar 31 '16 at 13:06

I have looked into my program include path. I have seen there are two location where time.h is present.

C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\include
C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\include

Replaced time.h file of path C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\include which was referring my program by coping from another location.

Error: the global scope has no "clock"

1 Answers1