program failed, can't load driver for OpenCL RTE , DE1 SoC

@moningWYL, did you read terasic's opencl manual (http://www.terasic.com.tw/attachment/archive/836/de1soc_opencl_v02.pdf)? It has step-by-step instructions as to how you can run the hello_world and vector_add examples. You probably didn't run the "source ./init_opencl.sh" command to set up the environment and load the kernel driver.