#include <iostream>#include <string>using namespace std;void main (){ cout<<"請輸入一組字串："; string line; cin>>line; int i; for(i=0;i<line.length();i++) if(line[i]>="A" && line[i]<="Z") line[i]=line[i]-"A"+"a"; cout<<"轉換後的字串逆序輸出為: "; for(i=line.length()-1;i>=0;i--) cout<<line[i]; cout<<endl;}望採納謝謝

#include<stdio.h>

#include<string.h>

main()

{chars[100];

inti,dx,xx,qt;

dx=0;

xx=0;

qt=0;

printf("請輸入字串");

gets(s);

for(i=0;i<strlen(s);i++)

{

if(s[i]<="z"&&s[i]>="a")

xx++;

elseif(s[i]<="Z"&&s[i]>="A")

dx++;

elseqt++;}

printf("大寫%d個，小寫%d個，其他的%d個\n",dx,xx,qt);}