Codechef tangled strings and to show all files in a directory

codechef1.cpp

@@ -0,0 +1,68 @@
+#include <iostream>
+#include <stdlib.h>
+#include <string.h>
+#include <string>
+#include <vector>
+#define max 5000
+using namespace std;
+
+void findsubstr(int i, string str1, string str2)
+{
+	 //string str="abab";
+    int a = str1.size();
+    int j =0;
+//int <vector> result;
+int total=0;
+    while(i<(a-j+1))
+    {
+        string temp = str1.substr (j,i);
+       // cout<<temp<<endl;
+
+
+                int  positions=0; // holds all the positions that sub occurs within str
+
+		size_t pos = str2.find(temp, 0);
+
+
+		while(pos != string::npos)
+		{
+		    positions++;
+		    pos = str2.find(temp,pos+1);
+		}
+		total = total + positions;
+
+		   //cout<<positions<<endl;
+
+		   j++;
+    }
+cout<<total<<" ";
+
+}
+
+int main()
+{
+
+
+	int t,l;
+	cin>>t;
+	string str1;
+	string str2;
+	while(t--)
+	{
+		cin>>str1;
+		cin>>str2;
+		cin>>l;
+		int a = str1.size();
+		int b = str2.size();
+
+		for(int i = 1;i<=l;i++)
+		{
+				findsubstr(i,str1, str2);
+
+		}
+		cout<<endl;
+
+	}
+	/* code */
+	return 0;
+}	

q1.c

@@ -0,0 +1,37 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <dirent.h>
+
+char *path_cat (const char *str1, char *str2);
+
+int main () {
+	struct dirent *dp;
+
+        // enter existing path to directory below
+	const char *dir_path="testing/";
+	DIR *dir = opendir(dir_path);
+	while ((dp=readdir(dir)) != NULL) {
+		char *tmp;
+		tmp = path_cat(dir_path, dp->d_name);
+		printf("%s\n", tmp);
+		free(tmp);
+		tmp=NULL;
+	}
+	closedir(dir);
+	return 0;
+}
+
+char *path_cat (const char *str1, char *str2) {
+	size_t str1_len = strlen(str1);
+	size_t str2_len = strlen(str2);
+	char *result;
+	result = (char*)malloc((str1_len+str2_len+1)*sizeof(char));
+	strcpy (result,str1);
+	int i,j;
+	for(i=str1_len, j=0; ((i<(str1_len+str2_len)) && (j<str2_len));i++, j++) {
+		result[i]=str2[j];
+	}
+	result[str1_len+str2_len]='\0';
+	return result;
+}