首先感谢博主无私分享！ 关于第 18 题： #include <stdio.h> void merge (char *d, int size,char* s1,char* s2){ while ( *s1 != 0 && *s2 != 0){ if (*s1 < *s2) *d++ = *s1++; else *d++ = *s2++; } while ( *s1 != 0 ) *d++ = *s1++; while ( *s2 != 0 ) *d++ = *s2++; *d = '\0'; } int main(void) { char s1[]="acmghn",s2[]="bcfhi",s3[20]; memset(s3,0,sizeof(s3)); merge(s3,sizeof(s3)-1,s1,s2); puts(s3); return 0; } 做出上述语法修改，但答案应该是：abccfhimghn</stdio.h>