被库函数整崩溃了

#include<iostream>
#include<opencv2/opencv.hpp>
#include<string>
#include<fstream>
using namespace std;
using namespace cv;
int char_int(const char *d) { int sum = atoi(d); return(int)sum; }
int main()
{
	string prePath = "F:\\zyq\\Jason2txt\\leftImg8bit\\use\\";
	ifstream intxt("sample_pos1.txt");
	string line;
	string picName;
	//if (intxt)
	//{
	//	while (getline(intxt, line))
	//	{
	//		//cout << line << endl;
	//		size_t p = 0;
	//		while (string::npos != p)
	//		{
	//			cout << line.substr(p, line.find(" "));
	//			p = line.find("", p + 1);
	//		}
	//	}
	//}

	string S = "erfurt_000041_000019_leftImg8bit.png 8 851 417 37 89 799 416 31 75 762 409 33 81 1425 394 69 169 1860 338 131 317 -57 307 167 406 148 325 166 405 1549 451 49 118";
				//cout << line << endl;
				size_t p = S.find(" ");
				size_t temp;
				cout << S.substr(0, p)<<endl; //输入图片名字
				int a[30][4];
				int count = 0;
				int i = 0;
				int j = 0;
				while (string::npos != p)
				{
					temp = p;
					p = S.find(" ", temp+1);
					string tempStr = S.substr(temp + 1, p - temp - 1);
				//	tempStr = +"\0";
					int temp1 = char_int(tempStr.c_str());

					if (!count)
					{
						count = temp1;
						cout << count << endl;
						continue;
					}		
					//cout << temp1 << endl;
					
					a[i][j++] = temp1;
					if (4 == j)
					{
						j = 0;
						++i;
					}
				}
				for (int i = 0; i < count; i++)
					for (int j = 0; j < 4; j++)
						cout << a[i][j]<<endl;
				system("pause");
}