To do this, you should check the variables argc and argv which contain respectively the number and the values of the parameters: int main(int argc, char* argv[]){}. Argument with index 0 is the name of the running program. The following values are the parameters of the program starting. For example:

./programm safe quick
argc = 3
argv[0] = /home/user/programm
argv[1] = safe
argv[2] = quick