C ++程序检查字符串的第一个和最后一个字符是否相等
给定一个字符串输入,任务是检查给定字符串的第一个和最后一个字符是否相等。
示例
Input-: study Output-: not equal As the starting character is ‘s’ and the end character of a string is ‘y’ Input-: nitin Output-: yes it have first and last equal characters As the starting character is ‘n’ and the end character of a string is ‘n’
下面使用的方法如下-
输入字符串并存储在字符串数组中。
使用length()
函数计算字符串的长度
检查字符串数组的第一个和最后一个元素,如果相等,则返回1,否则重新运行-1
打印结果输出
算法
Start Step 1-> declare 检查第一个和最后一个字符是否相等的函数 int check(string str) set int len = str.length() IF (len < 2) return -1 End If (str[0] == str[len - 1]) return 1 End Else return 0 End Step 2->Int main() declare string str = "nhooo" set int temp = check(str) If (temp == -1) Print “enter valid input" End Else if (temp == 1) Print "yes it have first and last equal characters" End Else Print "Not equal” Stop
示例
#include<iostream> using namespace std; //检查第一个和最后一个字符是否相等的函数 int check(string str) { int len = str.length(); if (len < 2) return -1; if (str[0] == str[len - 1]) return 1; else return 0; } int main() { string str = "nhooo"; int temp = check(str); if (temp == -1) cout<<"enter valid input"; else if (temp == 1) cout<<"yes it have first and last equal characters"; else cout<<"Not equal"; }
输出结果
如果我们运行以上代码,它将在输出后产生
yes it have first and last equal characters