Reorganize the repository structure to deal with more than one TP.

[TD_C.git] / TP_7.5 / exo3 / exo3.c

diff --git a/TP_7.5/exo3/exo3.c b/TP_7.5/exo3/exo3.c
new file mode 100644 (file)
index 0000000..03d6390
--- /dev/null
+++ b/TP_7.5/exo3/exo3.c
@@ -0,0 +1,66 @@
+#include <stdio.h>
+#include <ctype.h>
+
+//FIXME: Comment the code !!!
+
+void swap(char* v1, char* v2) {
+    if (v1 != v2) {
+        char tmp = *v1;
+        *v1 = *v2;
+        *v2 = tmp;
+    }
+}
+
+int stringLength(const char* str) {
+    int length;
+
+    for(length = 0; str[length] != '\0'; ++length);
+    return length;
+}
+
+// FIXME: this function have issues with non english characters
+void reverseString(char* str) {
+    int length = stringLength(str);
+
+    for (int i = length - 1; i >= length/2; --i) {
+        swap(&str[i], &str[(length - 1) - i]);
+    }
+}
+
+// FIXME: this function have issues with non english characters
+void permAlphaChar(char* str, int key) {
+    char alphabet[26] = "abcdefghijklmnopqrstuvwxyz";
+    int str_length = stringLength(str);
+
+    for (int i = 0; i < str_length; i++) { 
+        //if (str[i] == ' ') continue;
+        for (int j = 0; j < 26; j++) {
+            if (str[i] == alphabet[j]) {
+                str[i] = alphabet[(j+key) % 26];
+                break;
+             } else if (str[i] == toupper(alphabet[j])) {
+                str[i] = toupper(alphabet[(j+key) % 26]);
+                break;
+            }
+        }
+    }
+}
+
+int main() {
+    char rev_msg[] = "Bonjour le monde";
+    int rev_length = stringLength(rev_msg); 
+    char perm_msg[] = "Bonjour a tous et toutes";
+    int perm_length = stringLength(perm_msg); 
+
+    printf("La chaine de caracteres a inverser est \"%s\" et a pour longueur %d caractere(s)\n", rev_msg, rev_length);
+    reverseString(rev_msg);
+    printf("La chaine inversee de caracteres est \"%s\"\n", rev_msg);
+
+    printf("\n");
+   
+    printf("La chaine de caracteres a permuter est \"%s\" et a pour longueur %d caractere(s)\n", perm_msg, perm_length);
+    permAlphaChar(perm_msg, 13);
+    printf("La chaine permutee de caracteres est \"%s\"\n", perm_msg);
+
+    return 0;
+}