7-13

#include<stdio.h>

int main(void)

{

         int count,i;

         char str[80];

 

         printf("Enter a string:");

         i=0;

         while((str[i]=getchar())!='\n')

                   i++;

         str[i]='\0';

         count=0;

         for(i=0;str[i]!='\0';i++)

                   if(str[i]<='9'&&str[i]>='0')

                            count++;

                   printf("count=%d\n",count);

                   return 0;

}