warning: implicit declaration of function
You are using a function for which the compiler has not seen a declaration (“prototype“) yet. For example: You need to declare your function before main, like this, either directly or in a header:
c
warning: implicit declaration of function
You are using a function for which the compiler has not seen a declaration (“prototype“) yet. For example: You need to declare your function before main, like this, either directly or in a header:
How does strtok() split the string into tokens in C?
strtok() divides the string into tokens. i.e. starting from any one of the delimiter to next one would be your one token. In your case, the starting token will be from “-” and end with next space ” “. Then next token will start from ” ” and end with “,”. Here you get “This” … Read more
How to use execvp() to execute a command
The prototype of execvp is It expects a pointer to char as the first argument, and a NULL-terminated pointer to an array of char*. You are passing completely wrong arguments. You are passing a single char as first argument and a char* as the second. Use execlp instead: So Also the convention in UNIX is to print error messages to stderr and a process with an error should have … Read more
How to use execvp()
The first argument is the file you wish to execute, and the second argument is an array of null-terminated strings that represent the appropriate arguments to the file as specified in the man page. For example:
Working on code to calculate cosine with factorial sum
One thing I see, is that your for loop within main only runs through 2 real iterations, once for i == 0, and again for i == 1. For the taylor expansion to work fairly effectively, it needs to be run through more sequence terms (more loop iterations). another thing I see, is that your … Read more
Implementing Taylor Series for sine and cosine in C
Anything over 12! is larger than can fit into a 32-bit int, so such values will overflow and therefore won’t return what you expect. Instead of computing the full factorial each time, take a look at each term in the sequence relative to the previous one. For any given term, the next one is -((x*x)/(flag_2*(flag_2-1)) times the previous one. So … Read more
How many spaces for tab character(\t)?
A tab character should advance to the next tab stop. Historically tab stops were every 8th character, although smaller values are in common use today and most editors can be configured. I would expect your output to look like the following: The algorithm is to start a column count at zero, then increment it for … Read more
What is a segmentation fault?
Segmentation fault is a specific kind of error caused by accessing memory that “does not belong to you.” It’s a helper mechanism that keeps you from corrupting the memory and introducing hard-to-debug memory bugs. Whenever you get a segfault you know you are doing something wrong with memory – accessing a variable that has already … Read more
The difference between n++ and ++n at the end of a while loop? (ANSI C)
The only difference between n++ and ++n is that n++ yields the original value of n, and ++n yields the value of n after it’s been incremented. Both have the side effect of modifying the value of n by incrementing it. If the result is discarded, as it is in your code, there is no … Read more