想研究一下快读快写，结果a+b用快读快写WA了，可以看下吗？

code：

#include <iostream>

inline int read(){
	int sum = 0, nega = 1;
	char ch = getchar();
	while (ch > '9' || ch < '0'){
	    if (ch == '-')
	        nega = -1;
	        ch = getchar();
	}
	while (ch <= '9' && ch >= '0'){
	    sum = sum*10+ch-'0';
	    ch = getchar();
	}
	return sum*nega;
}


inline void write(int res){
    if (res < 0){
        res = -res;
        putchar('-');
    }
    if (res == 0){
        putchar('0');
        return ;
    }
    while (res){
        putchar(res%10+'0');
        res /= 10;
    }
	return ;
}

int main(){
    int a, b;
    a = read();
    b = read();
    write(a+b);
    return 0;
}