Question

Write a function that accepts a pointer to a C-string as its argument. The function should count the number of times the character 'w' occurs in the argument and return that number.

Answer 1

The function 'countW' is written in C and counts the number of times the character 'w' appears in a C-string. It iterates through the string, increments the count for each 'w', and returns the total count.

Step-by-step explanation:

The student wants to write a function in C that counts the occurrences of the character 'w' in a given C-string. We will define such a function that takes a pointer to a const char (C-string) and returns the count of 'w' characters found.

Example Function Definition

int countW(const char* str) {
int count = 0;
while (*str) {
if (*str == 'w') {
count++;
}
str++;
}
return count;
}

This function iterates over each character in the string until it reaches the null terminator (which is the end of the C-string). If the current character is 'w', the function increments a count. Once the loop is finished, the function returns the total count of 'w' characters.