diff --git a/operator/ascendc/0_introduction/25_simple_add/add_custom.asc b/operator/ascendc/0_introduction/25_simple_add/add_custom.asc
index 544e134f30e469577d839d112157425935cb9ab1..2e1cb90b933a30e634ddd2f385ba485ed92c9dc4 100644
--- a/operator/ascendc/0_introduction/25_simple_add/add_custom.asc
+++ b/operator/ascendc/0_introduction/25_simple_add/add_custom.asc
@@ -127,7 +127,7 @@ std::vector<float> kernel_add(std::vector<float> &x, std::vector<float> &y)
     aclrtSynchronizeStream(stream);
 
     aclrtMemcpy(zHost, totalByteSize, zDevice, totalByteSize, ACL_MEMCPY_DEVICE_TO_HOST);
-    std::vector<float> z((float *)zHost, (float *)(zHost + totalLength));
+    std::vector<float> z((float *)zHost, (float *)(zHost + totalByteSize));
 
     aclrtFree(xDevice);
     aclrtFree(yDevice);
@@ -155,7 +155,7 @@ uint32_t VerifyResult(std::vector<float> &output, std::vector<float> &golden)
     };
     printTensor(output, "Output");
     printTensor(golden, "Golden");
-    if (std::equal(output.begin(), output.end(), golden.begin())) {
+    if (std::equal(golden.begin(), golden.end(), output.begin())) {
         std::cout << "[Success] Case accuracy is verification passed." << std::endl;
         return 0;
     } else {