text: #include<stdio.h>
  #include"common.h"
  
  int main(int argc, char **argv)
  {
  	time_t clock;
  
  	if(argc < 2) {
  		printf("Usage: %s \"yyyy-mm-dd hh:mm:ss\"\n", argv[0]);
  		return 0;
  	}
  	clock = strtot(argv[1]);	
  	printf("time_t value is:%ld\n", clock);
  	return 0;
  
  }
  