C语言程序设计教程（第三版）课后习题6.2 （C语言描述和c++代码）

c实现

#include <stdio.h>

int main()

{

char ch;

int count_of_letter=0;

int count_of_number=0;

int count_of_space=0;

int count_of_other=0;

while(scanf("%c",&ch)&&ch!='\n')

{

if(ch== ' ')

count_of_space++;

else if(ch<='9'&&ch>='0')

count_of_number++;

else if((ch<='z'&&ch>='a')||(ch<='Z'&&ch>='A'))

count_of_letter++;

else 

count_of_other++;

}

printf("%d %d %d %d\n",count_of_letter,

count_of_number,count_of_space,count_of_other);

return 0; 

}

c++实现

#include <iostream>

using namespace std;

int main()

{

char ch;

int count_of_letter=0;

int count_of_number=0;

int count_of_space=0;

int count_of_other=0;

cin.get(ch);

while(ch!='\n')

{

if(ch== ' ')

count_of_space++;

else if(ch<='9'&&ch>='0')

count_of_number++;

else if((ch<='z'&&ch>='a')||(ch<='Z'&&ch>='A'))

count_of_letter++;

else 

count_of_other++;

cin.get(ch); 

}

cout<<count_of_letter<<" "

<<count_of_number<<" "

<<count_of_space<<" "

<<count_of_other<<endl;

return 0; 

}