home streak

After quite alot of babbling and working my code is almost done...
What i would love to know if how can I make the quicksort work for all 3 of my requested sort types a,b,c (D+E are something different) thanks again for your input :-P


#include<stdio.h>

#include <stdlib.h>

#include <string.h>



typedef struct surv_list SLIST;

struct surv_list {

int id;

int wage;

int sex;

int age;

};



int sort_id(const void *v1, const void *v2) {

SLIST *a1=(SLIST *)v1;

SLIST *a2=(SLIST *)v2;



return (a1->id - a2->id);

}



int main()

{

int /* PersonID,Wage,Sex,Age, */ n, i;

SLIST a[10], *aptr=a;

printf("please enter the amount of people you will use \n");

scanf("%d",&n);

printf("\n=%d\n\n", n);

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

{

printf("please enter the Person ID (person %d)\n", n);

scanf("%d",&a[i].id);

printf("please enter the Wage (person %d)\n", n);

scanf("%d",&a[i].wage);

printf("please enter the Age (person %d)\n", n);

scanf("%d",&a[i].age);

printf("please enter the Sex use 1 for male and 0 for female (person %d)\n", n);

scanf("%d",&a[i].sex);

}



printf("\t Survey Data:\n");

printf("\t~~~~~~~~~~~~~~~~~~~\n");

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

{

printf("Person %d\t", i);

printf("ID: %d\t", a[i].id);

printf("Wage: %d\t", a[i].wage);

printf("Sex: %d\t", a[i].sex);

printf("Age: %d\t\n", a[i].age);

}



int t;

char sort;

t=1;

while (t==1)

{

printf("\n\rHow do you want the data to be sorted ?");

printf("\n\rAscending by Person ID,type a");

printf("\n\rAscending by Wage, type b");

printf("\n\rAscending by Age, type c");

printf("\n\rOnly females, print d");

printf("\n\rOnly males, print e\n\r");

scanf("\n%c",&sort);

switch(sort) {

case 'a':

case 'A':

qsort(a, n, sizeof(SLIST), sort_id);

}





printf("\t Survey Data:\n");

printf("\t~~~~~~~~~~~~~~~~~~~\n");

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

{

printf("Person %d\t", i);

printf("ID: %d\t", a[i].id);

printf("Wage: %d\t", a[i].wage);

printf("Sex: %d\t", a[i].sex);

printf("Age: %d\t\n", a[i].age);

}



printf("Would you like to sort the data again Yes = 1 No = 0 \n");

scanf("%d",&t);





}return 0;

}

I suppose simplest would be to write new functions, sort_Wage, and sort_Age, which do the same thing as sort_id, except instead of using the ->id part of the struct, they use ->wage and ->age

Just a quick little thing, when you collect the input, you should use the variable 'i' instead of 'n' in:

Code:

---

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

{
printf("please enter the Person ID (person %d)\n", n);
scanf("%d",&a[i].id);
printf("please enter the Wage (person %d)\n", n);
scanf("%d",&a[i].wage);
printf("please enter the Age (person %d)\n", n);
scanf("%d",&a[i].age);
printf("please enter the Sex use 1 for male and 0 for female (person %d)\n", n);
scanf("%d",&a[i].sex);

}

---