int main(int argc,char**argv){
char *token = argv[1];
FILE *fp = fopen("./test.txt","a+");
char buf[1024];
char *p;
int s=-1,len=strlen(token),line=0,pos=-1;
while(!feof(fp)){
fgets(buf,sizeof(buf),fp);
line ++;
p = buf;
while(*p){
if(*p==token[0] && s==-1){
s = 0;
}else if(*p==token[s+1]){
s ++;
}else{
s = -1;
}