# include & ltstdlib.h & gt
# include & ltstring.h & gt
void main()
{
char str 1[128]= { 0 };
char str 2[128]= { 0 };
Printf("請輸入字符串1:");
scanf("s ",str 1);
Printf("請輸入字符串2:");
scanf("s ",str 2);
if(strlen(str 1)& lt;strlen(str2))
printf("%s\n ",str 2);
其他
printf("%s\n ",str 1);
strcat(str1,str 2);
printf("%s\n ",str 1);
}