# include & lt iostream & gt # include & lt math.h & gt # include & lt string.h & gt Use the namespace stdint main(){ char a[80], tempint len, i, j; CIN & gt； & gta； //Enter the integer string len = strlen (a); //Find the length of the input integer string for(int I = 0；; I & ltlenI++){// bubble sort for(int j = 0；; j & ltlen-I； j++)if(a[I]& gt； a[I+j]){ temp = a[I]； a[I]= a[I+j]； a[I+j]= temp； } } for(I = 0； I & ltlenI++)// output the sorted integer string cout <<A [i]; Cout & lt& ltendl returned 0; }