str is not malloc'd in main(), so its address has to be passed to the function in order to initialize it and to make it available in the main 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. Something like. Or, you can pass a pointer to an array, which is different from the above. We can return value of a local variable but it is illegal to return memory location that is … You're passing a variable of type char *[], i.e. There are two ways by which we can pass the parameters to the functions: 1. Point to be noted that when you do point = "blah" you are creating a string literal, and any attempt to modify is Undefined behaviour, so it should really be const char *. Following is a simple example where we pass an unsigned long pointer to a function and change the value inside the function which reflects back in the calling function −. For example if array name is arr then you can say that arr is equivalent to the &arr [0]. Or, you can pass a pointer to an array, which is different from the above. Example program – Passing structure to function in C by address: In this program, the whole structure is passed to another function by address. Pass char pointer/array to a function - w3programmers.org const char *ptrch { return "asd"; } ... const char* point = ptrch(); Passing a function as an argument is a useful concept in C/C++.This concept has already been used while passing a custom comparator function as an argument in std::sort() to sort a sequence of objects as per the need. The one I don't understand is Method 1. Passing array to function in C programming with example Passing The return statement terminates the execution of a function and returns a value to the calling function. You get the second if you use address-of on the array when passing: char myarray [] = "My love! How to pass a string to a function in C is explained in this article. Complex Numbers by Passing Structure to
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