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s.push()入栈
s.top()取栈顶元素
s.pop()出栈
s.empty()栈不为空
=======================
1.十进制转换成八进制/二进制
#include<iostream> #include<stack> //#include"windows.h" using namespace std; int main() { int n; stack<int> s; scanf("%d", &n); while (n) { s.push(n % 8); n = n / 8; } while (!s.empty()) { printf("%d", s.top()); s.pop(); } //system("pause"); return 0; } 主要思想： 建栈->余数入栈->出栈
2.十进制转换成16进制
#include<iostream> #include<stack> //#include"windows.h" using namespace std; int main() { int n; stack<int> s; scanf("%d", &n); while (n) { s.push(n % 16); n = n / 16; } while (!s.empty()) { if (s.top() > 9&&s.top()<16) { if (s.top() == 10) printf("A"); if (s.top() == 11) printf("B"); if (s.top() == 12) printf("C"); if (s.top() == 13) printf("D"); if (s.top() == 14) printf("E"); if (s.top() == 15) printf("F"); } else printf("%d", s.top()); s.pop(); } printf("\n"); //system("pause"); return 0; }
调用c++标准库函数进行进制转换
· sprintf(str,"%d",value)converts to decimal base.
· sprintf(str,"%x",value)converts to hexadecimal base.
· sprintf(str,"%o",value)converts to octal base.
/* itoa example */ #include <stdio.h> #include <stdlib.h> #include <iostream> #include <algorithm> //#include<windows.h> using namespace std; int main() { int i; char buffer[33]; printf("Enter a number: "); scanf("%d", &i); itoa(i, buffer, 10); printf("decimal: %s\n", buffer); itoa(i, buffer, 16); printf("hexadecimal小写: %s\n", buffer); transform(buffer, buffer + strlen(buffer), buffer, toupper);//转大写 toupper：将小写转换成大写，若不是字母，则返回原值 printf("hexadecimal大写: %s\n", buffer); itoa(i, buffer, 2); printf("binary: %s\n", buffer); //system("pause"); return 0; }
