added substring.c

README.md

@@ -105,6 +105,7 @@ These program are written in codeblocks ide for windows. These programs are not
 - [To check if a matrix is a sparse matrix or not](https://github.com/gouravthakur39/beginners-C-program-examples/blob/master/SparseMatrix_017.c)
 - [To calculate the Least Common Multiple](https://github.com/gouravthakur39/beginners-C-program-examples/blob/master/lcm.c)
 - [Lambda in C](https://github.com/gouravthakur39/beginners-C-program-examples/blob/master/lambda_in_c.c)
+- [All substrings of a string](https://github.com/gouravthakur39/beginners-C-program-examples/blob/master/substring.c)
 # Contributing
 This is a personal learning project for me.
 

substring.c

@@ -0,0 +1,31 @@
+// C program to print all possible substrings of a given string
+#include<stdio.h>
+#include<string.h>
+// Function to print all sub strings
+void subString(char str[], int n) 
+{
+    // Pick starting point
+    for (int len = 1; len <= n; len++) 
+    {    
+        // Pick ending point
+        for (int i = 0; i <= n - len; i++) 
+        {
+            //  Print characters from current
+            // starting point to current ending
+            // point.  
+            int j = i + len - 1;            
+            for (int k = i; k <= j; k++) 
+                printf("%c",str[k]);
+
+            printf("\n");
+        }
+    }
+}
+
+// Driver program to test above function
+int main() 
+{
+    char str[] = "abcdef";
+    subString(str, strlen(str));
+    return 0;
+}