[Functions] Add +-*/ operators and reshape for FDTensor (#655)

* Add +-*/ functions

* Add same dims test case for operations

* add broadcast 0

* Add broadcast dim2 testcase

* Add broadcast dim3 and dim4 testcase

* Add +-*/ operators

* Add mixed operation

* refresh code style

* Add reshape op

* update code style

fastdeploy/utils/utils.cc

@@ -13,6 +13,7 @@
 // limitations under the License.
 
 #include "fastdeploy/utils/utils.h"
+#include <sstream>
 
 namespace fastdeploy {
 
@@ -55,4 +56,14 @@ std::vector<int64_t> GetStride(const std::vector<int64_t>& dims) {
   return result;
 }
 
+std::string Str(const std::vector<int64_t>& shape) {
+  std::ostringstream oss;
+  oss << "[ " << shape[0];
+  for (int i = 1; i < shape.size(); ++i) {
+    oss << " ," << shape[i];
+  }
+  oss << " ]";
+  return oss.str();
+}
+
 }  // namespace fastdeploy