>>908
#include <stdio.h>
int main(void) {
    char ctmp[4] = {0x10, 0x20, 0x30, 0x40};
    int iResult = 0, i;
    for (i = 0; i < 4; i++)
        (iResult <<= 8) += ctmp[i];
    printf("%X", iResult);
}