ctime.c


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#include <stdlib.h>
#include <stdio.h>
#include <time.h>

int main(int argc, char *argv[])
{
    time_t t;

    if (argc>1)
    	t=(time_t)strtol(argv[1],NULL,0);
    else
    	t=time(NULL);

    printf("%s",ctime(&t));

    return 0;
}