如何用 C++ 实现把字符串的所有大写变小写

1、创建工程

3、编写代码#include <iostream>using name衡痕贤伎space std;int main(){while(1)撑俯擂摔{char str[100];cout<<"请输入内容__________以#结尾"<<endl;for(unsigned int i = 0; i < 100; i++){scanf("%c",&str[i]);if(str[i]=='#'){str[i]='\0';break;}}for(i = 0; i < strlen(str); i++)if(str[i] >= 'A' && str[i] <= 'Z')//大写的字母str[i] += 32;//转小写std::cout << str << std::endl;}return 0;}