void to_base_n(int num, int base)
{
int r;
if(num>0){
r=num%base;
to_base_n(num/base, base);
printf("%d", r);
}
}
#include<stdio.h>
#include<ctype.h>
#include"ex9.h"
//* 9-1 */
double two_min(double x,double y){
return(x>y?y:x);
}
void func_9_1(void){
double x=3,y=4;
printf("the smaller between %lf and %lf is %lf\n",x,y,two_min(x,y));
}
//* 9-2 */
void chline(char ch,int i,int j){
for (int l = 0; l < j; l++) {
if(l<i)putchar(' ');
else putchar(ch);
}
}
void func_9_2(void){
chline('*',2,5);
printf("\n");
}
//* 9-3 */
void chlinerow(char ch,int i,int j){
for (int l = 0; l < i; l++) {
for(int m=0;m<j;m++)putchar(ch);
printf("\n");
}
}
void func_9_3(void){
chlinerow('*',2,5);
printf("\n");
}
//* 9-4 */
double cmeans(double x,double y){
return(1/(1.0/2*(1/x+1/y)));
}
void func_9_4(void){
double x=3,y=4;
printf("the cmeans between %lf and %lf is %lf\n",x,y,cmeans(x,y));
}
//* 9-5 */
void larger_of(double *x,double *y){
*x = *y = *x>*y?*x:*y;
}
void func_9_5(void){
double x=3,y=4;
larger_of(&x,&y);
printf("x = %lf, y = %lf\n",x,y);
}
//* 9-6 */
int find_a(char ch){
int num = -1;
if (isupper(ch)) num = ch - 'A' +1;
if (islower(ch)) num = ch - 'a' +1;
return(num);
}
void func_9_6(void){
char ch;
int num;
printf("please input your stings:\n");
while((ch=getchar()) != EOF){
num = find_a(ch);
if(num >= 0)printf("%c is %d\n",ch,num);
else printf("ch is not a alpha.\n");
}
}
//* 9-7 */
double power_re(double x,int i){
double num=1;
if (x == 0 || i == 0) num = 1;
else{
if (i>0) for(int j=0;j<i;j++)num *= x;
else for(int j=0;j<-i;j++)num *= 1/x;
}
return(num);
}
void func_9_7(void){
double x =2.0;
int i=2,j=-2;
printf("%.2lf^%d = %.2lf\n",x,i,power_re(x,i));
printf("%.2lf^%d = %.2lf\n",x,j,power_re(x,j));
}
//* 9-8 */
double power_8(double x,int i){
double num=1;
if (x == 0 || i==0) num = 1;
else {
if (i>0) num = power_8(x,i-1) * x ;
else num = 1/x * power_8(x,i+1);
}
return(num);
}
void func_9_8(void){
double x =2.0;
int i=2,j=-2;
printf("%lf^%d = %lf\n",x,i,power_8(x,i));
printf("%lf^%d = %lf\n",x,j,power_8(x,j));
}
//* 9-9 */
void to_base_n(int base,int num){
int n=0;
if (num < base) n = num;
else{
n = num%base;
to_base_n(base,num/base);
}
printf("%d",n);
}
void to_base_n(unsigned int para,unsigned short int para1)
{
if(para < para1){
printf("%u",para);
return;
}
to_base_n((para / (unsigned int)para1),para1);
printf("%u",(unsigned int)para % para1);
}
void to_base_n(unsigned long n, unsigned int base)
{
int r =0;
r = n % base;
if(n >= base)
to_base_n(n/base, base);
putchar('0' + r);
return;
}
void to_base_n(int n, int range)
{
int r;
r = n % range;
if(n >= range)
to_base_n(n/range,range);
printf("%d",r);
//putchar('0'+r);
}
int main(void)
{
int number = 0, base = 0;
while(!feof(stdin)){
printf("\nEnter the number: ");
scanf("%d", &number);
printf("Enter the base to convert to: ");
scanf("%d", &base);
if(base<BINARY || base>DECIMAL){
printf("The base has to be in the [2,10] range. Try again!\n");
continue;
}
else
printf("%d in base %d is: ", number, base);
to_base_n(number,base);
putchar('\n');
}
return 0;
}
int main(void)
{
unsigned long number;
unsigned int base;
printf("Enter an inreger and a base(q to quit):\n");
while(scanf("%lu %u",&number,&base) == 2)
{
if(base < 2 || base > 10)
{
printf("Please enter base range of 2 to 10!\n");
printf("Enter an inreger and a base(q to quit):\n");
continue;
}
printf("%lu's base %u equivalent:",number,base);
to_base_n(number,base);
while(getchar() != '\n');
putchar('\n');
printf("Enter an inreger and a base(q to quit):\n");
}
return 0;
}
int main()
{
int number;
int binary;
printf("Enter two integer (q to quit):\n");
while(scanf("%d%d",&number,&binary) == 2)
{
printf("num=%d,binary=%d\n",number,binary);
while(binary<LIMIT1 || binary>LIMIT2)
{
printf("%d is beyond the range,enter a num between %d to %d:",binary,LIMIT1,LIMIT2);
scanf("%d",&binary);
}
printf("Binary equivalent:");
to_base_n(number,binary);
putchar('\n');
printf("Enter two integer (q to quit):\n");
}
printf("Bye!\n");
return 0;
}
void func_9_9(void){
int base =8,num=129;
printf("your number is:\n");
to_base_n(base,num);
printf("\n");
}
int main(void)
{
to_base_n(65535,2);
return 0;
}
