c programming :

Question

please help me write a program to get numbers until user enters "-1" then prints all the numbers in reverse order .

for exp :

12

14

45

123

-1

prints :

-1 123 45 14 12

Answer 1

#include <stdio.h>

#include <stdlib.h>

/* Queue data structure:

/* Puts integer x onto the back of array A and increases the nSize counter */

int Array_Push( int * A, int x, int * nSize)

{

int N = *nSize;

int iReturn=0;

int * tempArray =(int*) realloc(A,(N+1)*sizeof(int));

if (N==0)

{

A[0] = x;

(*nSize)=1;

}

else

{

if (tempArray != NULL)

{

tempArray[N] = x; //ingter added here

A = tempArray;

tempArray = NULL;

(*nSize)++;

}

else

{

iReturn = -1;

}

}

return(iReturn);

}

int main()

{

int * A = (int *) malloc(sizeof(int));

A[0]=0;

int nCount=0;

int iNum=0;

while (iNum!=-1)

{

printf(" Please input the # :>");

scanf("%d",&iNum);

Array_Push(A,iNum,&nCount);

}

for (int iLoop=nCount-1; iLoop>=0; iLoop--)

{

printf("%d ",A[iLoop]);

}

free(A);

}