Posted 13 February 2009 - 10:23 AM
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#include <stdio.h>
int main(void)
{
int numbers[10000];
int oddsum, evensum, result;
printf("Enter an array of intergers:\n");
scanf("%d", &numbers);
return 0;
}
Posted 13 February 2009 - 10:57 AM
MultiQuote
/*
C program to find ... the maximum, the minimum and the average values of ...
an array of numbers entered via the keyboard; uses a DYNAMIC ARRAY of doubles
*/
#include <stdio.h>
#include <stdlib.h>
void getAryInfo(double* ary, int size, double* max, double* min, double* avg);
int main()
{
double* ary; /* this is a pointer ... i.e. ary holds an address */
int c, i, n;
/* get n ... */
do
{
n = 0;
printf( "Please enter the number of observations : " );
scanf( "%d", &n );
while( getchar() != '\n' ); /* flush stdin ... */
if( n <= 0 ) printf("Please enter a number greater than 0 ...\n");
}while( n <= 0 );
/* now get a block of memory for the array of n doubles */
ary = (double*) malloc(n * sizeof(double));
/*
ary now holds the address of the start of memory
just allocated to hold n 'doubles'
*/
/* now ... get the numbers into the 'ary' array memory reservd above ... */
for( i=0; i<n; ++i )
{
printf( "observation %-3d : ", i+1 );
ary[i] = 0;
scanf( "%lf", &ary[i] ); /* Note: 'lf' for correct input of doubles */
while( getchar() != '\n' ); /* flush all chars in stdin stream */;
if( ary[i] == 0 )
{
printf("Is this value %lf correct that you entered (y/n) ? :", ary[i]);
c = getchar();
if( !(c == 'y' || c =='Y') )
{
printf("Ok ... skipped ...\n");
--i;
while( c != '\n' ) c=getchar(); /* flush all chars in stdin stream */;
continue;
}
while( c != '\n' ) c=getchar(); /* flush all chars in stdin stream */;
}
}
/* show numbers in the array ... */
printf( "\nYou entered ...\n\n" );
for( i=0; i<n; ++i )
{
printf( "%-3d : ", i+1 );
printf( "%g\n", ary[i] );
}
/* get variables to hold info ... note: values to be returned by 'ref' */
double max, min, avg;
/* Note: ary below is already an 'address' of the array of doubles */
getAryInfo( ary, n, &max, &min, &avg ); /* we pass 'addresses' to pointer variables */
printf( "\nThe info you desired is ... \n\n" );
printf( "Max: %g Min: %g Average: %g\n\n", max, min, avg );
printf("Press 'Enter' to continue ... ");
getchar();
free( ary ); /* free the dynamic memory allocated for the array of n doubles */
return 0;
}
/* Note .... We are catching 'addresses' .... */
/* so inside ... we have to use the value at that address by using *var */
void getAryInfo(double* ary, int size, double* max, double* min, double* avg)
{
double sum = *min = *max = ary[0]; /* use this as a 'opening' value .... */
int i;
for( i=1; i<size; ++i ) /* start at 1 since already used 0 above */
{
sum += ary[i]; /* sum = sum + ary[i] */
if (ary[i] < *min) *min = ary[i]; /* update ... if applies */
if (ary[i] > *max) *max = ary[i];
}
/* when we reach ... we have max, min and sum ... So can find average */
*avg = sum/size;
}
/*
C program to find ... the numOdds and the numEvens for ...
an array of numbers entered via the keyboard ...
(This example uses a DYNAMIC ARRAY of integers.)
*/
#include <stdio.h>
#include <stdlib.h>
int getPosInteger();
void fillAry(int* a, int size);
void getAryInfo(int* a, int size, int* eSum, int* oSum);
void showOddEvenAry(int *a, int size);
int main() /* ******************** MAIN ************************************** */
{
/* get variables to hold odd/even info; values to be returned by 'ref' */
int numEven, numOdd;
int* ary; /* this is a pointer ... i.e. ary holds an address */
int n = getPosInteger(); /* n = total number of integers in the array ...*/
/* now get a block of memory for the array of n int's */
ary = (int*) malloc(n * sizeof(int));
/*
ary now holds the address of the start of memory
just allocated to hold n integers
*/
/* now ... get the numbers into the 'ary' array memory reserved above ... */
fillAry(ary, n);
/* show numbers in the array ... */
printf( "\nYou entered ...\n\n" );
showOddEvenAry(ary, n);
/* Note: ary below is already an 'address' of the array of int's */
getAryInfo( ary, n, &numEven, &numOdd ); /* we pass 'addresses' to pointer variables */
printf( "\nThe info you desired is ... \n\n" );
printf( "Odd: %d Even: %d\n\n", numOdd, numEven );
printf("Press 'Enter' to continue ... ");
getchar();
free( ary );/* free the dynamic memory allocated for the array of n int's */
return 0;
} /* ******************************** END MAIN ****************************** */
int getPosInteger()
{
int n;
for(;;)
{
n = 0;
printf( "Please enter the number of elements : " );
scanf( "%d", &n );
while( getchar() != '\n' ); /* flush stdin ... */
if( n <= 0 )
{
printf("Please enter a number greater than 0 ...\n");
continue;
}
// else ... if reach here
return n;
}
}
void fillAry(int* a, int size)
{
int i, c;
for( i=0; i<size; ++i )
{
printf( "element %-3d : ", i+1 );
a[i] = 0;
scanf( "%d", &a[i] ); /* Note: 'lf' for correct input of int's */
while( getchar() != '\n' ); /* flush all chars in stdin stream */;
if( a[i] == 0 )
{
printf("Is this value %d correct that you entered (y/n) ? :", a[i]);
c = getchar();
if( !(c == 'y' || c =='Y') )
{
printf("Ok ... skipped ...\n");
--i;
while( c != '\n' ) c=getchar(); /* flush all chars in stdin stream */;
continue;
}
while( c != '\n' ) c=getchar(); /* flush all chars in stdin stream */;
}
}
}
/* Note .... We are catching 'addresses' .... */
/* so inside ... we have to use the value at that address by using *var */
void getAryInfo(int* a, int size, int* eSum, int* oSum)
{
int i;
*eSum = 0;
*oSum = 0;
for( i=0; i<size; ++i ) /* start at 1 since already used 0 above */
{
if (a[i]%2 == 0) ++*eSum;
else ++*oSum;
}
}
void showOddEvenAry(int *a, int size)
{
int i;
for(i=0; i<size; ++i)
{
printf( "%-3d : ", i+1 );
if( a[i] % 2 == 0 ) printf( "\t\t%d\n", a[i] );
else printf( "%d\n", a[i] );
}
}
This post has been edited by David W: 13 February 2009 - 01:27 PM
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