finished negate

.gitignore

@@ -5,9 +5,10 @@ signed
 twos
 negate2s
 f32
+.vscode
 
 # macOS
 .DS_Store
 
-# IDE
+# IDEif (i >= 0) 
 .idea

negate2s.c

@@ -2,7 +2,37 @@
 // I pledge the COMP 211 honor code.
 
 #include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
 
-int main() {
+int main(int argc, char *argv[]) {
+    char input[33]; 
+    char output[33] = {'\0'};
+
+    strncpy(input, argv[1], 32);
+    input[32] = '\0';
+
+    for (int i = 0; i < 32; i++)
+        output[i] = (input[i] == '0') ? '1' : '0';
+    
+    output[32] = '\0';
+
+    if (input[0] == '1') {
+        int carry = 1;
+        for (int i = 31; i >= 0 && carry; i--) {
+            output[i] = (input[i] == '0') ? '1' : '0';
+            if (input[i] == '0') carry = 0;
+        }
+    } else {
+        int i = 31;
+        while (input[i] == '0' && i >= 0) {
+            output[i] = '0';
+            i--;
+        }
+
+        output[i] = '1';
+    }
+    
+    printf("%s\n", output);
     return EXIT_SUCCESS;
-}
+}