Question

C Question:

Write a function p3 which receives a C string as a parameter, and an array of integers which will serve as indices into the string. The third parameter is the length of the integer array. The function jumbles the characters in the string according to the indices in the array of numbers. For example:

char course [] = "CSC 373 Computer Systems I"; int indices[ ] = {0,1,4,5,6,7,0,1,25};

Then the function call p3(course, indices, 9);

would cause course to contain “CS373 CSI” (with garbage after the new ‘\0’ character)

Answer 1

If you have any doubts, please give me comment...

#include<stdio.h>

void p3(char *, int *, int len);

int main(){

char course[] = "CSC 373 Computer Systems I";

int indices[] = {0,1,4,5,6,7,0,1,25};

p3(course, indices, 9);

return 0;

}

void p3(char course[], int indices[], int len){

int i;

char s[50];

for(i=0; i<len; i++){

s[i] = course[indices[i]];

}

s[i] = '\0';

printf("%s\n", s);

}