c语言中八进制控制字符串,C语言八进制字符串转十进制方法

#include int  fun( char *p )

{   int   n;

n= *p-'0';

p++;

while( *p!='\0' ) {

n=n*8+*p-'0';

p++;

}

return  n;

}

main()

{   char   s[6];     int  i;   int   n;

printf("Enter a string (Ocatal digits):  "); gets(s);

if(strlen(s)>5){ printf("Error: String too longer !\n\n");exit(0); }

for(i=0; s[i]; i++)

if(s[i]'7')

{  printf("Error: %c not is ocatal digits!\n\n",s[i]);exit(0); }

printf("The original string:  "); puts(s);

n=fun(s);

printf("\n%s is convered to integer number: %d\n\n",s,n);

}