Level 4: Statistics of the number of characters in a string ------- C language programming technology (cyclic structure programming 1)
#include<stdio.h>
int main(void)
{
/*********Begin*********/
char str[81];
int i,letter=0,dight=0,space=0,other=0;
gets(str);//输入一个字符串
for(i=0;str[i]!='\0';i++)//扫描字符串的每一个数组
if(str[i]>='A'&&str[i]<='Z'||str[i]>='a'&&str[i]<='z')
letter++;//字母个数统计
else if(str[i]>='0'&&str[i]<='9')
dight++;//数字统计
else if(str[i]==' ')
space++;
else
other++;
printf("%d %d %d %d",letter,dight,space,other);
/*********End**********/
return 0;
}