07/07/13 14:03:44
>>357
#include <stdio.h>
int myatoi(char *buf)
{
char *p = buf;
int n = 0;
while(*p != '\0') {
if(isdigit(*p)) { n *= 10; n += *p - '0'; p++; }
else return -1;
return n;
}
int main(void)
{
int n;
char buf[128];
scanf("%s", buf);
n = myatoi(buf);
printf("%d\n", n);
return 0;
}