os/p/c3/main.c
2019-06-14 20:04:43 +02:00

26 lines
360 B
C

#include <stdio.h>
#include <string.h>
int toInt(char *s)
{
int ret = 0, base = 1;
int len;
len = strlen(s);
while (s[--len] >= '0')
{
ret += (s[len] - '0') * base;
base *= 10;
}
if (s[0] == '-')
ret *= -1;
return (ret);
}
int main(int argc, char **argv)
{
printf("%d\n", toInt(argv[1]));
}