Facing incorrect output while linking programs - unix

Question

I am having a trouble in calling the user defined functions in the main program, using unix. the program is executing only for the number generation in the main program. but when i call the predefined function . the output retrieved is incorrect. Can someone please correct me where i have done it wrong
My main program states as
#include <stdio.h>
#include <stdlib.h>
void sort1(int []);
int main(void) {
int array[100];
int i , j;
printf("ten random numbers in [1,1000]\n");
for (i = 1; i <= 10; i++)
{
generate random numbers
}
printf("The list of Hundred random numbers are \n");
for (j = 1; j <= 10; j++ )
{
//to print the random numbers
}
sort1(array);
return 0;
}
//this is my user defined function: sort1.c
include <stdio.h>
int sort1(int a[])
{
int array[100], i, d, swap, e=10;
// algortithm
}
}
printf("Sorted list in ascending order:\n");
for ( i= 0 ; i< e ; i++ )
printf("%d\n", array[i]);
}
I get the output as
ten random numbers in [1,1000]
The list of Hundred random numbers are
--This gives correct output
Sorted list in ascending order:
1
-1442229816
0
-1444472964

Answer 1

#include <stdio.h>
#include <stdlib.h>
void sort1(int []);
int main(void) {
int array[100];
int i;
printf("ten random numbers in [1,1000]\n");
for (i = 1; i <= 10; i++)
{
array[i] = rand()%1000 + 1;
}
printf("The list of Hundred random numbers are \n");
for (i = 1; i <= 10; i++ )
{
printf("Element[%d] = %d\n", i, array[i] );
}
//Up to here it's ok but you have set the values in the positions 1-10 of the array so keep consistent with it
sort1(array);
printf("Sorted list in ascending order:\n");
for ( i= 1 ; i<= 10 ; i++ )
printf("%d\n", array[i]);
return 0;
}
void sort1(int a[])
{
int i,swap,sorted=0;
while(sorted==0){ //flag to know if array is sorted 0 means not sorted.
sorted=1; // we set the flag to sorted at start of sweep
for (i= 1 ; i<= (10-1); i++) //sweep through array
{
if (a[i] > a[i+1]) //check if sorted
{
swap = a[i];
a[i] = a[i+1];
a[i+1] = swap;
sorted=0; //if not sorted set flag to 0 and swap
}
}
}
}
Main problems in your code:
1) array[100] is not initialized in sort1 function.
2) I do not understand your sorting algorithm but in any case you are checking for values of a[0] which are not initialized so take care of the array positions you use each time and be consistent with it.
3) function prototype does not match