#include stdioh#include stringhvoid insertchar str for int i = strlenstr; i 0; --i str2i = stri; str2i-1 = ; int main char s1100 = abc; inserts1; putss1;把这个代码变简单

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

void insert(char str[]) { int len = strlen(str); for (int i = len - 1; i >= 0; i--) { str[2i+1] = str[i]; str[2i] = ' '; } }

int main() { char s1[] = "abc"; insert(s1); puts(s1); return 0; }