Avoid NULL Pointer in strcpy C

1 year ago
Liam
1 minute

Before using the strcpy function, it is advisable to check for NULL pointers to avoid errors. One can use conditional statements to verify if the pointer is NULL and refrain from executing the strcpy operation if it is indeed NULL. For instance:

char source[] = "Hello";
char* dest = NULL;

if(dest != NULL) {
    strcpy(dest, source);
}

This ensures that the strcpy operation only occurs when the dest pointer is not NULL, preventing errors. Additionally, the strncpy function can be used as a replacement for strcpy. It allows for specifying the maximum length to copy, thus avoiding buffer overflow.

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