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// Simple atoi program
int atoi_(int src[]) {
int s;
s = 0;
int isMinus;
isMinus = 1;
int i;
i = 0;
while(src[i] == 32) { // 跳过空白符
i = i + 1;
}
if(src[i] == 43 || src[i] == 45) {
if(src[i] == 45) {
isMinus = -1;
}
i = i + 1;
} else if (src[i] < 48 || src[i] > 57) {
//如果第一位既不是符号也不是数字，直接返回异常值
s = 2147483647;
return s;
}
while (src[i] != 0 && src[i] > 47 && src[i] < 58) {
s = s * 10 + src[i] - 48;
i = i + 1;
}
return s * isMinus;
}
int main () {
int string[500];
int temp;
temp = 0;
int i;
i = 0;
while (temp != 10) {
temp = getch();
string[i] = temp;
i = i + 1;
}
string[i] = 0;
i = atoi_(string);
putint(i);
return 0;
}
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