#include <iostream>
#include <string.h>
using namespace std;
/***將字符串轉成int***/
int char2int(const char* str) {
const char* p = str;
bool neg = false;
int res = 0;
if (*str == '-' || *str == '+') {
str++;
}
while (*str != 0) {
if (*str < '0' || *str > '9') {
break;
}
res = res * 10 + *str - '0';
str++;
}
if (*p == '-') {
res = -res;
}
return res;
}
/***將int轉成字符串***/
void int2char(int v, char* s) {
int t = v < 0 ? -v : v;
int i = 0;
char buf[10] = "";
while (t) {
buf[i++] = t % 10 + '0';
t = t / 10;
}
int len = v < 0 ? i+1 : i;
for (int j = 0; j < i; j++) {
s[j + len - i] = buf[i - j - 1];
}
s[len] = 0;
if (len - i > 0) {
s[0] = '-';
}
return;
}
int main()
{
char s[10];
snprintf(s, 10, "%s", "-1314520");
int i = char2int(s);
cout << i << endl;
char str[10];
int2char(9079968, str);
cout << str << endl;
}