How to check if string starts with certain string in C?

Question

For example, to validate the valid Url, I\'d like to do the following

char usUrl[MAX] = \"http://www.stackoverflow\"

if(usUrl[0] == \'h\'
   && usUr         


        

Answer 1

A solution using an explicit loop:

#include 
#include 
#include 

bool startsWith(const char *haystack, const char *needle) {
    for (size_t i = 0; needle[i] != '\0'; i++) {
        if (haystack[i] != needle[i]) {
            return false;
        }
    }

    return true;
}

int main() {
    printf("%d\n", startsWith("foobar", "foo")); // 1, true
    printf("%d\n", startsWith("foobar", "bar")); // 0, false
}