So i have some code in C where i am trying to build 2 functions 1) \'Read Names\

Question

So i have some code in C where i am trying to build 2 functions 1) 'Read Names', and 2)'Sort Names'

so far everything works, but i cannot figure out how to make 'sortNames' - it is supposed to sort the names in ascending order and print them.

I am using xcode

#include<stdio.h>

#include<string.h>

void readNames(char [][10], int);

void sortNames(char [][10], int);

int main(){

char names[10][10]; //This is the decleration for the 2-D array

int n; //number of students

printf("Please enter number of students: ");

scanf("%d", &n);

readNames(names, n);

sortNames(names, n);

int i;

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

printf("%s ", names[i]);

return 0;

}

void readNames(char names[][10], int n) //reading names function

{

int i;

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

{

printf("Please enter name of %d student: ",(i+1));

scanf("%s", names[i]);

}

}

Explanation / Answer

#include<stdio.h>
#include<string.h>
#include<stdlib.h>


int cstring_cmp(const void *a, const void *b)
{
const char **ia = (const char **)a;
const char **ib = (const char **)b;
return strcmp(*ia, *ib);
}
void sortNames(char **names, int len)
{
qsort(names,len, sizeof(char *), cstring_cmp);
return;
}
void readNames(char **names, int n) //reading names function
{
  
int i;
for(i=0; i<n; i++)
{
printf("Please enter name of %d student: ",(i+1));
scanf("%s", names[i]);
}
}
int main(){
  
char **names; //This is the decleration for the 2-D array
names = (char **)malloc(sizeof(char *)*10);
int i,n; //number of students
for(i=0;i<10;i++)names[i] = (char *)malloc(sizeof(char)*10);
  
printf("Please enter number of students: ");
scanf("%d", &n);
  
readNames(names, n);
  
sortNames(names, n);
  
printf("Sorted names: ");
for(i=0; i<n; i++)
printf("%s ", names[i]);
  
return 0;
}

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