add some functions to convert input char to dimension and tensor

neuron_t/test/Makefile

@@ -14,7 +14,7 @@ NEURODIR=$(PWD)/..
 DIMDIR=$(PWD)/../../dimension_t
 INCLUDE_DIR=$(PWD)/../src
 CFLAGS=-I$(INCLUDE_DIR) -I$(YPERMDIR)/src -I$(YTESTDIR)/include_ytest/include -I$(DIMDIR)/src -I$(TENSDIR)/src #"-D DEBUG=1"
-LDFLAGS=-L$(YTESTDIR) -lytest -lOpenCL
+LDFLAGS=-L$(YTESTDIR) -lytest -lOpenCL -lm
 
 #SRC_DIR=$(ROOT_DIR)/src
 #SRC=$(wildcard */*/*.c)