Visual C++ Error: Debug Assertion Failed - c++

Question

Hello i compliled my c++ program and if i start the .exe i got a error
Image from the error
This is my source(main.cpp):
#include <iostream>
#include <string>
#include <Windows.h>
#include <dos.h>
#include <stdio.h>
#include <fstream>
#include <ctime>
// using
using namespace std;
bool fexists(const char *filename);
int main() {
try {
HANDLE h;
string cClipboard = "";
CreateDirectory("C:\\Program Files\\Clipboard Logger", NULL);
if (!fexists("C:\\Program Files\\Clipboard Logger\\log.txt")) {
FILE *fp;
fp = fopen("C:\\Program Files\\Clipboard Logger\\log.txt", "w");
fclose(fp);
}
while (true) {
if (!OpenClipboard(0)) {
Sleep(2000);
continue;
}
h = GetClipboardData(CF_TEXT);
CloseClipboard();
if ((char *)h == cClipboard) {
Sleep(2000);
continue;
}
cClipboard = (char *)h;
time_t t = time(0);
struct tm * now = localtime(&t);
FILE *fp;
fp = fopen("C:\\Program Files\\Clipboard Logger\\log.txt", "a");
int day = now->tm_mday;
int month = now->tm_mon + 1;
int year = now->tm_year + 1900;
int sec = now->tm_sec;
int min = now->tm_min;
int hour = now->tm_hour;
char logLine[sizeof((char *)h) + 64];
sprintf(logLine, "%d.%d.%d %d.%d.%d %s\n", hour, min, sec, day, month, year, (char *)h);
fprintf(fp, (char *)logLine);
fclose(fp);
cout << (char *)logLine << endl;
Sleep(2000);
}
getchar();
return 0;
} catch (...) {
}
}
bool fexists(const char *filename) {
ifstream ifile(filename);
if (ifile)
return true;
return false;
}
iam new in c++ and i dont know how to fix it, because if i debug the program all works fine but with the exe it doesnt work.