Question

求一道C语言的编程题

从键盘输入一个字符串存入数组s[80]，统计该字符串的长度，统计其中大写字母、小写字母、数字字符、空格和其它字符的个数，并将其中所有小写字母改为大写字母，然后再将结果输出。

Answer 1

#include "stdio.h"

int main()

{

     char s[80]={0};

     int i,countA=0,countB=0,countC=0,countD=0,countE=0;

     gets(s);

     for(i=0;s[i]!='\0';i++)

     {

              if(s[i]>='A' && s[i]<='Z')

                  countA++;

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

              {

                  countB++;

                  s[i]+='A'-'a';

              }

              else if(s[i]>='0' && s[i]<='9')

                   countC++;

              else if(s[i]==' ')

                   countD++;

              else 

                   countE++;

 

      }

      printf("输入字符串中大写字母数:%d\n",countA);   

      printf("输入字符串中小写字母数:%d\n",countB); 

      printf("输入字符串中数字字符数:%d\n",countC);

      printf("输入字符串中空格字符数:%d\n",countD);

      printf("输入字符串中其它字符数:%d\n",countE);

      printf("小写字母转成大写字母后输出为:%s\n",s);

 

 

 

}

Answer 2

void func()
{
char s[80] = {0};
int len = 0;
int bNum = 0;
int sNum = 0;
int nNUm = 0;
int spNum = 0;
int i;

printf(" 请输入字符串：\n");
for(i = 0; i < 79; i++)
{
s[i] = getchar();
if (s[i] = '\n')
{
s[i] = '\0';
break;
}
}
len = strlen(s);;
printf("总长度为：%d\n", len);

for (i = 0; i < len; i++)
{
if (s[i] >= 'a' && s[i] <= 'z')
{
sNum++;
s[i] += 'A' - 'a';
}
else if (s[i] >= 'A' && s[i] <= 'Z')
{
bNum++;
}
else if (s[i] >= '0' && s[i] <= '9')
{
nNum++;
}
else if (s[i] == ' ')
{
spNum++;
}
}

printf("大写字母有%d个\n", bNum);
printf("小写字母有%d个\n", sNum);
printf("空格有%d个\n", spNum);
printf("其他字符有%d个\n", len - bNum - sNum - spNum);
printf("%s\n", s);
}

Answer 3

#include <stdio.h>
#include <ctype.h>
#include <string.h>
int main()
{
    char s[80] = {'\0'};
    int i, digital = 0, upper_alpha = 0, low_alpha = 0, space = 0, other = 0, length;
    gets(s);
    length = strlen(s);
    for (i = 0; i < length; i++)
    {
        if (islower(s[i]))
        {
            low_alpha++;
            s[i] = toupper(s[i]);
        }
        else if (isupper(s[i]))
            upper_alpha++;
        else if (isdigit(s[i]))
            digital++;
        else if (isspace(s[i]))
            space++;
        else
            other++;
    }
    printf("%2d %2d %2d %2d %2d\n", low_alpha, upper_alpha, digital, space, other);
    for (i = 0; i < length; i++)
    {
        printf("%c", s[i]);
    }
    printf("\n");
    return 0;
}