c语言代码解决问题

解题思路:

注意事项:

参考代码:

#include<stdio.h>

#include<string.h>

int main()

{

char str[101], str1[1000];

gets(str);

str[strlen(str)] = '\0';

int i,j=0,k;

for (i = 0; i < strlen(str); i++)

{

if (str[i] >= 'a' && str[i] <= 'z' || str[i] >= 'A' && str[i] <= 'Z')

{

str1[j++] = str[i];

}

else if (str[i] >= '1' && str[i] <= '9')

{

for (k = 1; k <= (int)str[i] - (int)'0'-1; k++)

{

str1[j++] = str[i - 1];

}

}

}

str1[j] = '\0';

puts(str1);

return 0;

}