题解 | #计算某字符出现次数# 攒人品

//输入输出参考一下文章
//https://blog.csdn.net/weixin_44774630/article/details/123404107?utm_medium=distribute.pc_relevant.none-task-blog-2~default~baidujs_baidulandingword~default-0-123404107-blog-116506148.235^v38^pc_relevant_sort_base2&spm=1001.2101.3001.4242.1&utm_relevant_index=1

var readline = require("readline");
const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout,
});
const lines=[]
rl.on("line",function(line){
    lines.push(line)
})
rl.on("close",()=>{
    let str=lines[0].toLowerCase()
    let char=lines[1].toLowerCase()
    let ans=0
    for(let i=0;i<str.length;i++){
        if(str[i]===char){
            ans++
        }
    }
    console.log(ans)
})