Add string reversal program in string.c

string.c

@@ -0,0 +1,36 @@
+//Program to reverse a string without using library function
+
+#include <stdio.h>
+
+int main() {
+    char str[100];
+    char rev[100];
+    int i, length = 0;
+
+    // Input string from user
+    printf("Enter a string: ");
+    fgets(str, sizeof(str), stdin);
+
+    //Display the entered string
+    printf("You entered: %s", str);
+
+    // Calculate length of string
+    for (i = 0; str[i] != '\0'; i++) {
+        length++;
+    }
+
+    // Adjust length if newline character is present
+    if (length > 0 && str[length - 1] == '\n') {
+        length--;
+    }
+
+    // Reverse the string
+    for (i = 0; i < length; i++) {
+        rev[i] = str[length - 1 - i];
+    }   
+
+    //Display the reversed string
+    rev[length] = '\0'; // Null-terminate the reversed string
+    printf("Reversed string is: %s\n", rev);
+    return 0;
+}