题目:
1.数制转换(非负数十进制整数转换为八进制数)
方法一:非递归实现
1 #include <stdio.h> 2 #include <stdlib.h> 3 4 /* run this program using the console pauser or add your own getch, system("pause") or input loop */ 5 #define max 100 6 typedef struct { 7 int data[max]; 8 int top ; 9 }SEQSTACK; 10 void initstack(SEQSTACK *s){ 11 /*顺序栈初始化*/ 12 s->top=0; 13 } 14 int gettop(SEQSTACK *s){ 15 /*返回栈顶元素*/ 16 int x; 17 if(s->top==0){ 18 printf("栈空 "); 19 x=0; 20 21 } 22 else{ 23 x=(s->data)[s->top]; 24 } 25 return x; 26 } 27 int push (SEQSTACK *s,int x){ 28 /*元素x入栈*/ 29 if(s->top==max-1){ 30 printf("栈满 "); 31 return 0; 32 } 33 else{ 34 s->top++; 35 (s->data)[s->top]=x; 36 return 1; 37 } 38 } 39 int pop(SEQSTACK *s){ 40 /*返回栈顶元素并删除栈顶元素*/ 41 int x; 42 if(s->top ==0){ 43 printf("栈空 "); 44 x=0; 45 } 46 else { 47 x=(s->data)[s->top]; 48 s->top--; 49 } 50 return x; 51 } 52 main(){ 53 SEQSTACK stack ,*s; 54 int n; 55 s=&stack; 56 initstack (s); 57 n=0; 58 printf("输入一个非负数(十进制):"); 59 scanf("%d",&n); 60 push (s,'#'); 61 while(n!=0){ 62 push (s,n%8); 63 n=n/8; 64 } 65 printf(" 对应的八进制数为:"); 66 while(gettop(s)!='#'){ 67 printf("%d",pop(s)); 68 } 69 printf(" "); 70 }
测试结果:
2.方法二:递归实现:
1 #include <stdio.h> 2 #include <stdlib.h> 3 4 /* run this program using the console pauser or add your own getch, system("pause") or input loop */ 5 #define max 100 6 void d_to_or(int x){ 7 /*非负十进制整数转换为八进制数的递归算法*/ 8 if(x/8!=0) 9 d_to_or(x/8); 10 printf("%d",x%8); 11 } 12 main(){ 13 int x; 14 printf("输入一个非负整数(十进制)"); 15 scanf("%d",&x); 16 printf(" 对应的八进制数为"); 17 d_to_or(x); 18 printf(" "); 19 20 }
测试结果:
3.编程实现非负十进制数转换成二进制数和十六进制数
(1)转换成二进制数:
方法一:递归算法;
1 #include <stdio.h> 2 #include <stdlib.h> 3 4 /* run this program using the console pauser or add your own getch, system("pause") or input loop */ 5 #define max 100 6 void d_to_or(int x){ 7 /*非负十进制整数转换为八进制数的递归算法*/ 8 if(x/2!=0) 9 d_to_or(x/2); 10 printf("%d",x%2); 11 } 12 main(){ 13 int x; 14 printf("输入一个非负整数(十进制)"); 15 scanf("%d",&x); 16 printf(" 对应的二进制数为"); 17 d_to_or(x); 18 printf(" "); 19 20 }
方法二;非递归算法:
1 #include <stdio.h> 2 #include <stdlib.h> 3 4 /* run this program using the console pauser or add your own getch, system("pause") or input loop */ 5 #define max 100 6 typedef struct { 7 int data[max]; 8 int top ; 9 }SEQSTACK; 10 void initstack(SEQSTACK *s){ 11 /*顺序栈初始化*/ 12 s->top=0; 13 } 14 int gettop(SEQSTACK *s){ 15 /*返回栈顶元素*/ 16 int x; 17 if(s->top==0){ 18 printf("栈空 "); 19 x=0; 20 21 } 22 else{ 23 x=(s->data)[s->top]; 24 } 25 return x; 26 } 27 int push (SEQSTACK *s,int x){ 28 /*元素x入栈*/ 29 if(s->top==max-1){ 30 printf("栈满 "); 31 return 0; 32 } 33 else{ 34 s->top++; 35 (s->data)[s->top]=x; 36 return 1; 37 } 38 } 39 int pop(SEQSTACK *s){ 40 /*返回栈顶元素并删除栈顶元素*/ 41 int x; 42 if(s->top ==0){ 43 printf("栈空 "); 44 x=0; 45 } 46 else { 47 x=(s->data)[s->top]; 48 s->top--; 49 } 50 return x; 51 } 52 main(){ 53 SEQSTACK stack ,*s; 54 int n; 55 s=&stack; 56 initstack (s); 57 n=0; 58 printf("输入一个非负数(十进制):"); 59 scanf("%d",&n); 60 push (s,'#'); 61 while(n!=0){ 62 push (s,n%2); 63 n=n/2; 64 } 65 printf(" 对应的二进制数为:"); 66 while(gettop(s)!='#'){ 67 printf("%d",pop(s)); 68 } 69 printf(" "); 70 }
(2)转换成十六进制数:
方法一:递归算法
1 #include <stdio.h> 2 #include <stdlib.h> 3 4 /* run this program using the console pauser or add your own getch, system("pause") or input loop */ 5 #define max 100 6 void d_to_or(int x){ 7 8 /*非负十进制整数转换为八进制数的递归算法*/ 9 int a; 10 a=x%16; 11 char b; 12 if(x/16!=0) 13 d_to_or(x/16); 14 if(a>=10){ 15 if(a==10){ 16 printf("A"); 17 } 18 if(a==11){ 19 printf("B"); 20 } 21 if(a==12){ 22 printf("C"); 23 // b='c'; 24 } 25 if(a==13){ 26 printf("D"); 27 } 28 29 if(a==14){ 30 printf("E"); 31 } 32 if(a==15){ 33 printf("F"); 34 } 35 } 36 else{ 37 printf("%d",a); 38 } 39 } 40 main(){ 41 int x; 42 printf("输入一个非负整数(十进制)"); 43 scanf("%d",&x); 44 printf(" 对应的二进制数为"); 45 d_to_or(x); 46 printf(" "); 47 }
方法二:非递归算法:
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其他方法:不考虑算法实现:(mao主席)
1 #include <stdio.h> 2 #include <stdlib.h> 3 #include <string.h> 4 void DtoOx(int x) 5 { 6 char str[] = "0123456789ABCDEF"; 7 char stack[100]=""; 8 int i = 0,j; 9 int temp = x; 10 while (x) 11 { 12 stack[i] = str[x % 16]; 13 x = x / 16; 14 i++; 15 } 16 printf("%d 的十六进制是:", temp); 17 for(j=i;j>=0;j--){ 18 printf("%c",stack[j]); 19 } 20 } 21 void DtoBinary(int x) 22 { 23 char str[]="01"; 24 char stack[100]=""; 25 int i=0,j; 26 int temp=x; 27 while(x) 28 { 29 stack[i]=str[x%2]; 30 x=x/2; 31 i++; 32 } 33 printf("%d 的二进制数是:",temp); 34 for(j=i;j>=0;j--){ 35 printf("%c",stack[j]); 36 } 37 } 38 39 int main() 40 { 41 int x,y; 42 printf("请输入一非负整数(十进制):"); 43 scanf("%d",&x); 44 DtoOx(x); 45 printf(" "); 46 printf("请输入一非负整数(十进制):"); 47 scanf("%d",&y); 48 DtoBinary(y); 49 }