“程序收到信号SIGSEGV，分段错误”当试图使用递归获取3个字符组合的所有关键字时

Question

我试图使用递归获取3个字符的所有关键字，但在一些调用后可能调用堆栈已满并且程序崩溃并出现分段错误错误，代码：

#include <cs50.h>
#include <stdio.h>

void three_Characters(char c, char c2, char c3);

int main(void){
    three_Characters('A', 'A', 'A');
    return 0;
}

void three_Characters(char c, char c2, char c3){

//print 3-characters 
    printf("%c%c%c - ", c, c2, c3);

    /*Recursion termination*/
    if(c == 'z' && c2 == 'z' && c3 == 'z'){
        return;
    }

    /*Avoid symbol characters */
    if(c3 == 'Z'){
        c3 += 6;
        if(c2 == 'Z'){
            c2 += 7;
            if(c == 'Z'){
            c += 7;
            }
        }
    }

    if(c3 == 'z'){
        if(c2 == 'z'){
            c += 1;   c2 = 65;   c3 = 64;
        }else{
            c2 += 1;  c3 = 64;
        }
    }
    three_Characters(c, c2, c3 + 1); 
}