隔三秒输出一次系统时间，程序问题。。。
#include<stdio.h>
#include<time.h>
#include<string.h>

int main()
{
int i=0;
char s[]="Thu Jan 01 08:00:03 1970",a[50]={-1},*p;//想要它隔三秒输出一次系统时间Thu Jan 01 08:00:03 1970
time_t timep,timep1,timep2;
time(&timep);
time(&timep1);
timep2=timep1-timep;
p=ctime(&timep2);
for(;*p!='\0';i++)
{
a[i]=*p;
p++;
}
printf("time is:%s\n",a);

while(strcmp(a,s)!=0)
{
time(&timep1);
timep2=timep1-timep;
p=ctime(&timep2);
for(i=0;*p!='\0';i++)
{
a[i]=*p;
p++;
}
}
printf("time2 is:%s\n",ctime(&timep1));
return 0;
}

为什么strcmp(a,s)!=0老是判断有问题，总是死循环、、、求教高手

[解决办法]

C/C++ code

#include<stdio.h>#include<time.h>#include<string.h>#include<stdlib.h>int main(){    char s[]="Thu Jan 01 08:00:03 1970", a[50] = {-1}, *p;    time_t timep,timep1,timep2;    time(&timep);    time(&timep1);    timep2=timep1-timep;    p=ctime(&timep2);    strcpy(a, s);    printf("time is:%s\n",a);    printf("%d\n", strcmp(a, s));    while(strcmp(a,s)!= 0)    {        time(&timep1);        timep2=timep1-timep;        p=ctime(&timep2);        strcpy(a, s);    }    printf("time2 is:%s\n",ctime(&timep1));    return 0; }