The prototype for srand is void srand(unsigned int) (provided you included <stdlib.h>).This means it returns nothing … but you’re using the value it returns (???) to assign, by initialization, to a. Edit: this is what you need to do:
Why do I get clang: error: linker command failed with exit code 1? You just declared the function. There is not any definition in code. At the time of linking process , compiler(here clang) cannot link power function to its definition so linker throws the error in this kind of situation. If you define Then linker can … Read more
My guess is that the file is failing to open, and you’re still passing it to fgets. Your if(rd==NULL) doesn’t stop execution of the fgets if it’s null, it just prints out a message and continues with execution. Some very basic errorr handling:
Possible Duplicate:What is double star? I am fairly new to C, and have come across this statement I have a pretty good idea of what typedef does, but I have never seen char** before. I know that char* is a char array or similiar to a string. Im not sure if char** is a 2d … Read more
Normally that error occurs when a } was missed somewhere in the code, for example: would fail with this error due to the missing } at the end of the function. The code you posted doesn’t have this error, so it is likely coming from some other part of your source.
C itself doesn’t support exceptions but you can simulate them to a degree with setjmp and longjmp calls. This website has a nice tutorial on how to simulate exceptions with setjmp and longjmp http://www.di.unipi.it/~nids/docs/longjump_try_trow_catch.html
Vector and list aren’t conceptually tied to C++. Similar structures can be implemented in C, just the syntax (and error handling) would look different. For example LodePNG implements a dynamic array with functionality very similar to that of std::vector. A sample usage looks like: As can be seen the usage is somewhat verbose and the code needs to be … Read more
Either allocate the string on the stack on the caller side and pass it to your function: Or make the string static in getStr: Or allocate the string on the heap:
The No symbol table loaded message you are getting is misleading: all GDB is telling you is that your binary does not have any debugging info in it. Usually this is solved by rebuilding the binary with -g flag, but since you are given an already compiled and linked file, you can’t do that. Without debug info, certain commands, such as list, break … Read more
I’m assuming that this “type_of_assessment” variable is of char * (pointer to a character) so when you are comparing a character to a char pointer it throws this error. This char * variable stores the address of the actual value stored so you have to de reference it first. Try this in your if condition: