cast to unsigned int

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

unsigned int getSizeInCharsAlignedToInt(unsigned int iSizeInChars)
{
    return (iSizeInChars+(sizeof(int)-1))/sizeof(int)*sizeof(int);
}

int main (int argc, char **argv){

    unsigned char* pCBuff = NULL;
    int numOfChars = 5;
    int buffSize;
    unsigned int* pUIBuff;
    int iSize2;

    printf("sizeof char: 1\n");
    printf("sizeof int: %zu\n", sizeof(int));

    buffSize = getSizeInCharsAlignedToInt(numOfChars);

    printf("buffSize: %d\n", buffSize);

    pCBuff=calloc(buffSize,1);

    if(!pCBuff)
    {
        printf("can't allocate memory buffer");
        return -1;
    }

    for(int i = 0; i<numOfChars; ++i)
    {
       pCBuff[i]=i;
    }

    for(int i = 0; i<numOfChars; ++i)
    {
       printf("%d ",pCBuff[i]);
    }

    printf("\n");

    pUIBuff = (unsigned int*)pCBuff;


    iSize2 = buffSize/sizeof(int);

    printf("iSize2: %d\n", iSize2);

    for(int i = 0; i<iSize2; ++i)
    {
       printf("0x%X ",pUIBuff[i]);
    }

    printf("\n");

    free(pCBuff);

return 0;
}