C Reference function difftime()
Usage of difftime():
double difftime ( time_t time2, time_t time1 );
Parameters:
Time1 and time2 are both time_t objects.
Return Value:
The difference in seconds between time2-time1 will be returned as a floating point double.
Explanation:
Calculates the difference in seconds between time1 and time2.
Source code example of difftime():
#include <stdio.h>
#include <time.h>
int main ()
{
time_t time1,time2;
char get_input [256];
double dif_sec;
time (&time1);
printf ("Please enter the name of your pet: ");
gets (get_input);
time (&time2);
dif_sec = difftime (time2,time1);
printf ("It took you %.2lf seconds to type the name.\n", dif_sec );
return 0;
}
Output example of the program above:
Please enter the name of your pet: wodan
It took you 2.00 seconds to type the name.
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Thanks for the example.
Some C programmer struggling to produce a simple time delay (in seconds).
Here my example:
#include
void delay(int sec); /* Function declaration */
int main()
{
….
delay (3) /* sec = 3 seconds delay */
….
return 0;
}
/* Time delay function definition */
void delay(int s)
{
time_t time1,time2; /* declare timer */
time (&time1); /* initialize both timer */
time (&time2);
while (difftime (time2,time1) <= s) /* Loop until time difference is equal to s seconds */
time (&time2);
}
Regards
Lutz Pansegrau