例7-12

#include<stdio.h>

int main(void)

{

    int i,number;

    char str[10];

 

    printf("Enter a string:");

    i=0;

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

        i++;

    str[i]='';

 

    number=0;

    for(i=0;str[i]!='';i++)

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

            number=number*10+str[i]-'0';

 

        printf("digit=%d
",number);

 

        return 0;

}