Project 3 Frequently Asked Questions

  • ffmpeg and ffplay don't seem to be installed on my machine.

    You can find those programs in /afs/nd.edu/user37/ccl/software/external/ffmpeg/bin on the CSE student machines.

  • How can I construct a string that contains a floating point number to use as the -s argument?

    Use the very handy function sprintf, which is like printf but puts the result in a string. Then, re-use what you learned in the previous project to split the string into words. For example, something like this: 

    char command[256];
char *words[100];

sprintf(command,"./mandel -x -.5 -y .5 -m 2000 -s %lf",zoom);

word[0] = strtok(command," ");

while(1) {
   ...
}

  • I get linking errors when I try to use exp and log!

    These are in the math library, so you need to include math.h and add the argument -lm to your link line.