kj501:

自己写了个程序试试，呵呵，只能转换int类型整数。

#include
int main()
{
    int num = 23165;
    int temp[8];
    int i;
    /* print number in decimal base */
    printf("the decimal number is %d\n", num);

    /* transform binary number to hexadecimal notation */
    for (i=7; i>=0; i--) {
    if ( (temp[i] = num & 0x0f) > 9)
            temp[i] += ('A' - 10);
        else
            temp[i] += '0';
        num = num >> 4;
    }

    /* print number in hexadecimal base */
    printf("the hexadecimal number is ");
    for (i=0; i<8; i++)
        if ('0' != temp[i]) printf("%c",temp[i]);

    printf("\n");
}

DoDo:#include
int main(){
    char a[255] = "";
    sprintf(a, "hex(16)=%X", 16);
    return 0;
}