/*%U %S %E %P %F %R %w %W*/
/*the process resource information is written in "temp.txt" with format as above*/
void print()
{
FILE *fp;
fp = fopen("temp.txt"， "r");
if(fp==NULL)
{
printf("open error ");
return ;
}
//get information from "temp.txt"
double user_time， sys_time， per，elapsed;
int maj_flt， min_flt， sa， sw;
if(fscanf(fp， "%lf %lf 0:%lf"， &user_time， &sys_time， &elapsed)!=3) printf("wrong 1 ");
if(fscanf(fp， "%d %d %d %d %lf"， &maj_flt， &min_flt， &sw， &sa， &per)!=5) printf("wrong 2 ");
printf("CPU time %.1lfms (user time %.1lfms， system time %.1lfms) "， (user_time+sys_time)*1000.0， user_time*1000.0， sys_time*1000.0);
printf("elapsed time %.1lfms major fault %d， minor fault %d swap %d context switch %d "， elapsed*1000.0，maj_flt， min_flt， sa， sw);
}
int solve(char *s)
{
/*make format like: /usr/bin/time -o temp.txt -f "%U %S %E %P %F %R %w %W" command*/
strcpy(tmp， s);
strcpy(s， pre);
int j=strlen(s);
s[j++]=' ';
s[j++]='"';
strcpy(s+j， sp);
j=strlen(s);
s[j++]='"';
s[j++]=' ';
strcpy(s+j， tmp);
/*output system command*/
printf("command is %s "， s);
return system(s);
}
int main ()
{
int child_sta=0;
rusage usage;
time_t ep_t1， ep_t2;
while(gets(input))
{
int j = getToken(input);
if(j<0)  printf("input not obeying format ");
else
{
strcpy(cmd， input+j);
int p = strlen(cmd)-1;
while(cmd[p]==' '&&p>=0) p--;
cmd[p+1] = ''; // delete white space after command
solve(cmd);
print();
}
}
return 0;
}