Add Perl, C, C++, BASIC and Forth solutions

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+/*
+Challenge 197
+
+Task 2: Range List
+Submitted by: Mohammad S Anwar
+You are given a sorted unique integer array, @array.
+
+Write a script to find all possible Number Range i.e [x, y] represent range
+all integers from x and y (both inclusive).
+
+
+Each subsequence of two or more contiguous integers
+
+
+Example 1
+Input: @array = (1,3,4,5,7)
+Output: [3,5]
+Example 2
+Input: @array = (1,2,3,6,7,9)
+Output: [1,3], [6,7]
+Example 3
+Input: @array = (0,1,2,4,5,6,8,9)
+Output: [0,2], [4,6], [8,9]
+*/
+
+#include <iostream>
+#include <string>
+#include <vector>
+
+void print_ranges(const std::vector<int>& nums) {
+    int nums_size=static_cast<int>(nums.size());
+    std::cout<<"(";
+    std::string sep="";
+    for (int i=0; i<nums_size; i++) {
+        int j=0;
+        while (i+j<nums_size && nums[i]+j==nums[i+j])
+            j++;
+        if (j>1) {
+            std::cout<<sep<<"["<<nums[i]<<","<<nums[i+j-1]<<"]";
+            sep=", ";
+            i+=j-1;
+        }
+    }
+    std::cout<<")"<<std::endl;
+}
+
+int main(int argc, char* argv[]) {
+    argv++; argc--;
+    if (argc == 0) {
+        std::cerr<<"usage: ch-1 nums..."<<std::endl;
+        return EXIT_FAILURE;
+    }
+
+    std::vector<int> nums;
+    for (int i=0; i<argc; i++)
+        nums.push_back(atoi(argv[i]));
+
+    print_ranges(nums);
+}