Your assignment is to write your own version of some of the functions in the bui

Question

Your assignment is to write your own version of some of the functions in the
built-in <string.h> C library.

4. Write a function called strncpy406. It is passed 3 parameters: 2 strings
and the length of the destination array (the first parameter). The intent of
including a third parameter is to prevent overflow of the destination array
in case the source array (the second parameter) contains a string that is too
long to be stored in the destination. strncpy406 returns a pointer to the
destination array.
For example:
char s1[] = "comp";
char s2[] = "systems";
strncpy(s1, s2, 4);
printf("%s ");
The output of the above code should be syst.

printf(" Problem 4 ");
char ababc[] = "abcbc";
char *s = ababc;
char *sb = strchr406(s, 'b');
printf("Address of 'b' in %s is %x ", ababc, sb);
printf("String is %s ", sb);
char *sc = strchr406(s,'c');
printf("Address of 'c' in %s is %x ", ababc, sc);
printf("String is %s ", sc);
char *sd = strchr406(s,'d');
printf("Address of 'd' in %s is = %d ", ababc, sd);

Explanation / Answer

char* strncpy406(char *destination, const char *source, int lenDestStr)

{

if(strlen(source)<=lenDestStr)

{

while(*source!='o')

{

*destination=*source;

destination++;

source++;

}

*destination='o';

return destination;

}

}

char* strchr406(char *str,char ch)

{

while(*str!='o')

{

if(*str==ch)

return str;

}

return NULL;

}

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