modify error

test.c

@@ -47,14 +47,14 @@ int main() {
     fa=DOUBLE_TO_FX(da);
     fb=DOUBLE_TO_FX(db);
     
-    fc=fx_2308_l_mul(fa,fb);
+    fc=fx_s2308_l_mul(fa,fb);
 	printf("\n\t====== Multiplication =======\n");
 	printf("\n\tmul1: Exact answer = %f func result = %f, error = %f\n", da*db, FX_TO_DOUBLE(fc), da*db-FX_TO_DOUBLE(fc));
-	fc=fx_2308_l_mul2(fa,fb);
+	fc=fx_s2308_l_mul2(fa,fb);
 	printf("\n\tmul2: Exact answer = %f func result = %f, error = %f\n",da*db, FX_TO_DOUBLE(fc), da*db-FX_TO_DOUBLE(fc));
-	fc=fx_2308_l_mul3(fa,fb);
+	fc=fx_s2308_l_mul3(fa,fb);
 	printf("\n\tmul3:  Exact answer = %f func result = %f, error = %f\n",da*db, FX_TO_DOUBLE(fc), da*db-FX_TO_DOUBLE(fc));
-	fc=fx_2308_l_mul4(fa,fb);
+	fc=fx_s2308_l_mul4(fa,fb);
 	printf("\n\tmul4: Exact answer = %f func result = %f, error = %f\n",da*db, FX_TO_DOUBLE(fc), da*db-FX_TO_DOUBLE(fc));
 
 	printf("\n\t====== Division =======\n");