编辑代码

#include <stdio.h>
int main () {
    int ch, number=0;
    
    printf("Please enter the content (enter ctrl + Z to quit)\n");
    while((ch = getchar()) != EOF){
        // if isspace(ch) continue;
        number++;
        // putchar(ch);
    }
    printf("\nThe nubmer of letter in content is %d", number);

}