1 files changed, 57 insertions, 0 deletions
diff --git a/src/c/string/strsubst/gstrsubsta.c b/src/c/string/strsubst/gstrsubsta.c
new file mode 100644
index 00000000..69ebf3c5
--- /dev/null
+++ b/src/c/string/strsubst/gstrsubsta.c
@@ -0,0 +1,57 @@
+#include <stdio.h>
+#include <string.h>
+#include "strsubst.h"
+ 
+void gstrsubsta(char* str,int size, char* search, int size2, char* rep, int size3, char* flagmain, int size4, char* out)
+{
+        int i = 0, j = 0, flag = 0, start = 0;
+ 
+    //if(flagmain[0]!='r')
+    //{
+        while (str[i] != '\0') 
+	{
+                if (str[i] == search[j]) 
+		{
+                        if (!flag)
+                                start = i;
+                        j++;
+                        if (search[j] == '\0')
+                                break;
+                        flag = 1;
+                } 
+		else 
+		{
+                        flag = start = j = 0;
+                }
+                i++;
+        }
+
+        if (search[j] == '\0' && flag) 
+	{
+                for (i = 0; i < start; i++)
+                        out[i] = str[i];
+                /* rep string with another string */
+                for (j = 0; j < strlen(rep); j++) 
+		{
+                        out[i] = rep[j];
+                        i++;
+                }
+
+                /* copy remaining portion of the input string "str" */
+                for (j = start + strlen(search); j < strlen(str); j++) 
+		{
+                        out[i] = str[j];
+                        i++;
+                }
+
+                /* print the out string */
+                out[i] = '\0';
+                //printf("Output: %s\n", out);
+        } 
+	else 
+	{
+                printf("%s is not a searching of %s\n", search, str);
+        }
+ //   }
+
+}