implemented readInput

src/userinput.c

@@ -2,6 +2,7 @@
 
 #include <ctype.h>
 #include <stdio.h>
+#include <stdlib.h>
 
 void trimLeft(char *input) {
     size_t length = strlen(input);
@@ -21,4 +22,28 @@ void trimRight(char *input) {
         input[index] = '\0';
         index--;
     }
+}
+
+char *readInput() {
+    size_t bufferSize = 100;
+    char *buffer = malloc(bufferSize*sizeof(char));
+    char c;
+    int index = 0;
+    do {
+        c = fgetc(stdin);
+        if (!(bufferSize > index)) {
+            char *newBuffer = malloc(2*bufferSize*sizeof(char));
+            for (int i = 0; i < bufferSize; i++) {
+                newBuffer[i] = buffer[i];
+            }
+            bufferSize *= 2;
+        }
+        buffer[index] = c;
+        index++;
+    }
+    while(c != '\n' && c != EOF);
+    buffer[index - 1] = '\0';
+    trimLeft(buffer);
+    trimRight(buffer);
+    return buffer;
 }