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/* Note:Your choice is C IDE */
#include "stdio.h"
main(int argc, char *argv[])
{
FILE *fp;
char ch;
int num=0,max;
int line=0;
if((fp=fopen(argv[1],"rt"))==NULL)
{
printf("\nCannot open file strike any key exit!");
getch();
exit(1);
}
while(ch!=EOF)
{
if(wherex()==1) {num++;printf("%d: ",num);}
putchar(ch);
ch=fgetc(fp);
}
max=num;
num=0;
fclose(fp);
while(1)
{
num=0;
fp=fopen(argv[1],"rt");
ch=fgetc(fp);
while(ch!=EOF)
{
if(wherex()==1) {num++;printf("%d: ",num);}
if(num==line+24) break;
putchar(ch);
ch=fgetc(fp);
}
printf("Which line do you want going to?(Most %d)",max);
scanf("%d",&line);
if(line<=0) exit(1);
}
}


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ÔÚtime.hÍ·ÎļþÖУ¬¶¨ÒåÁË typedef long clock_t
clock()ÊÇÓÃÀ´¼ÆËãÁ½¸öʱ¼äµãÖ®¼äµÄʱ¼ä¼ä¸ô¡£ÈçϳÌÐò£º
#include <stdio.h>
int main()
{
 int i = 0;
 clock_t start_time, end_time;
 start_time = clock(); //¿ªÊ¼¼ÆÊ±, start_time = 0
 
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