View Code of Problem 43

#include <stdio.h>
#include<stdlib.h>
#include<math.h>
#include<string.h>

int main(){
	
	char a[90];
	char b[90];  //存放删除后的字符 
	gets(a);
	int k = 0;
	int len = strlen(a);
	for(int i = 0;i<len;i++){
		if((a[i]>='a'&&a[i]<='z')||(a[i]>='A'&&a[i]<='Z')){
			b[k] = a[i];
			k++;
			
		}
	}
	for(int i = 0;i<k;i++){
		printf("%c",b[i]);
	}

	
	
}