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10/ex5.c

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+#include <stdio.h>
+#include "IdanStringPointersLib.h"
+
+#define BACKSLASH_ZERO '\0'
+#define BOOLEAN unsigned short
+#define TRUE 1
+#define FALSE 0
+#define ZERO 0
+#define ONE 1
+#define TWO 2
+
+char * LastCharOfString(char * start_string)
+{
+    while (*(start_string++));
+
+    return (--start_string);
+}
+
+unsigned short StringLenght(char *start_string)
+{
+    return (LastCharOfString(start_string) - start_string);
+}
+
+void SwapChars(char *ptr_char1, char *ptr_char2)
+{
+    char temp_char = *ptr_char2;
+    *ptr_char2 = *ptr_char1;
+    *ptr_char1 = temp_char;
+}
+
+BOOLEAN StringCompare(char *start_stringA_index, char *start_stringB_index)
+{
+    while ((*start_stringA_index) && (*(start_stringA_index++) == *(start_stringB_index++)));
+
+    return (*--start_stringA_index == *--start_stringB_index);
+}
+
+char * IndexStringBInStringA(char *start_string_a, char *start_string_b)
+{
+    char *ptr_string_a_temp = start_string_a;
+    char temp = BACKSLASH_ZERO;
+    BOOLEAN flag = FALSE;
+    unsigned short textB_lenght = StringLenght(start_string_b);
+    char *address = (ptr_string_a_temp + textB_lenght);
+    while ((*(address - ONE)) * !flag)
+    {
+        SwapChars(&temp, address);
+        flag = StringCompare(ptr_string_a_temp, start_string_b);
+        SwapChars(&temp, address);
+        address = ((++ptr_string_a_temp) + textB_lenght);
+    }
+    
+    return (--ptr_string_a_temp);
+}
+
+unsigned int CountStringBInStringA(char *start_string_a, char *start_string_b)
+{
+    char *ptr_string_a_temp = start_string_a;
+    char temp = BACKSLASH_ZERO;
+    unsigned short count = ZERO;
+    unsigned short textB_lenght = StringLenght(start_string_b);
+    char *address = (ptr_string_a_temp + textB_lenght);
+    while (*(address - ONE))
+    {
+        SwapChars(&temp, address);
+        count += StringCompare(ptr_string_a_temp, start_string_b);
+        SwapChars(&temp, address);
+        address = ((++ptr_string_a_temp) + textB_lenght);
+    }
+    
+    return (count);
+}
+
+void CopyString(char *start_string_index, char *start_copy_index)
+{
+    while (*start_copy_index)
+    {
+        *(start_string_index++) = *(start_copy_index++);
+    }
+    *(start_string_index) = BACKSLASH_ZERO;
+}
+
+void RemoveStringBFromStringA(char *start_string_a, char *start_string_b)
+{
+    unsigned short textB_lenght = StringLenght(start_string_b);
+    char *ptr_index_stringB_in_stringA = IndexStringBInStringA(start_string_a, start_string_b);
+    CopyString(ptr_index_stringB_in_stringA, ptr_index_stringB_in_stringA + textB_lenght);
+}
+
+void RemoveAllStringBFromStringA(char *start_stringA_index, char *start_stringB_index)
+{
+    unsigned short loop_lenght = CountStringBInStringA(start_stringA_index, start_stringB_index);
+    unsigned short counter;
+    for (counter = ZERO; counter < loop_lenght; counter++)
+    {
+        RemoveStringBFromStringA(start_stringA_index, start_stringB_index);
+    }
+}
+
+//-----------------------------------------------------------------
+//								exe 5
+//                              -----
+// General : the program takes out all the appearnces of a word,
+//           from another string.
+//
+// Input   : two strings.
+//
+// Process : goes over each word in the second string, and deletes
+//           the words that appear from the first one.
+//
+// Output  : the original string, the second string, new string, and
+//           amount of changes made.
+//
+//-----------------------------------------------------------------
+// Proggramer : Cohen Idan 
+// Student No : 211675038
+// Date : 12.11.19
+//-----------------------------------------------------------------
+void main(void)
+{
+    char stringA[100] = "abgjskababababablgjkljab";
+    char stringB[100] = "ab";
+    RemoveAllStringBFromStringA(&stringA[0], &stringB[0]);
+    printf("Lenght: %s\n", stringA);
+
+}