#include <stdio.h>#include <stdlib.h>#include <string.h>#define DIFF_TIME_STAMP 480int main(int argc, char* argv[]){    FILE *fp;    char str[256];    char *ptr;    char *stopstring;    int val, val_prev = 0, iCnt = 0;    fp = fopen("c:\\rtp.txt", "r");    while ( fgets( str, sizeof(str)-1, fp) ){        if ( NULL == strstr(str, "Timestamp") ) continue;        ptr = strstr(str, ": ");                        ptr += 3;        val = strtol(ptr, &stopstring, 10);                    if (val_prev == 0 ){            printf("1st Timestamp is found.\n");            iCnt = 1;            val_prev = val;            continue;        }        if (DIFF_TIME_STAMP != val - val_prev){            printf("err %d, %d in %d th , diff=%d\n",                 val_prev, val, iCnt, val - val_prev);        }        iCnt ++;        val_prev = val;    }    printf("total Timestamp is %d lines\n", iCnt);    fclose(fp);    return 0;}