If you need to operate on strings, it’s helpful to abstract this away into separate functions (which can be held in different files) to keep your code clean and to reduce repetition. A string literal in C is of type an array of unqualified char, which decays to char *, i.e. Parameter Passing Techniques in C/C++. I'm passing a buffer (char*) to a function in C. Inside the function, I'm allocating memory for the buffer and appending a string (response from a dummy server). Passing (This doesn't answer your question, but it's to much to put in a comment.) result = calculateSum (num); However, notice the use of [] in the function definition. void func(char **s2); // Pointer to pointer int main(void) { char *s1 = malloc(20); // No need for `sizeof` as `sizeof(char)` is always 1 strcpy(s1, "main"); func(&s1); // Note use of `&` address-of operator } void func(char **s2) { free(*s2); // Note use of … Example 1. There are two ways by which we can pass the parameters to the functions: 1. 15,677. // student structure struct student { char id[15]; char firstname[64]; char lastname[64]; float points; }; Passing Strings in C Jul 20, 2019 C, Strings David Egan. Passing first and second - there is no difference between them. Character Array and Character Pointer in C - OverIQ.com Passing const char * to a function in C (i) These diagrams are unable to measure the precise extent of … In C language, there are three methods to convert a char type variable to an int. c Example: Passing Pointer to a Function in C Programming. In this example, we are passing a pointer to a function. When we pass a pointer as an argument instead of a variable then the address of the variable is passed instead of the value. So any change made by the function using the pointer is permanently made at the address of passed variable.