I am given the functions i need to use and i need to do the following things to

Question

I am given the functions i need to use and i need to do the following things to any given string. I am looking for the C code to do these modifications to the strings. Thanks

void removeChars(char *str, const char *cs) - this function should modify the input

string, str to remove all instances of each character provided in the string cs and shift

any subsequent characters forward. For example, a call to this function on the strings

"Hello World", "ol" would result in the string "He Wrd"

void replaceChar(char *str, char c, char replace) - this function should modify the input

string str and replace any and all instances of the character in the variable c with the

character replace.

Explanation / Answer

#include <stdio.h>

#include <string.h>

void removeChars(char *str, const char *cs)

{

// set up the look-up table

int i, j;

int discard[256];

for (i = 0; i < 256; ++i)

discard[i] = 0;

for (i = 0; i < strlen(cs); ++i)

discard[cs[i]] = 1;

for (j = 0; j < strlen(str); ++j)

if (!discard[str[j]])

printf("%c", str[j]);

}

void replaceChar(char *str, char c, char replace)

{

int i;

for (i = 0; i < strlen(str); ++i) {

if(str[i] == c) str[i] = replace;

}

}

int main()

{

char str[] = "Hello World";

removeChars(&str[0], "ol");

printf(" ");

replaceChar(&str[0], 'd', 'e');

printf("%s ", str);

return 0;

}

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