1、 //不明白這么簡(jiǎn)單的代碼為什么會(huì)出錯(cuò) #include int my_atoi(char *str); int main(void) { char a[]=" 12345"; int b=0; b = my_atoi(a); printf("%d", b); getchar(); return 0;
}
int my_atoi(char *str) { char* ?p = str;//char *p; p = str; int inter_symbol = 1; int inter_number = 0; while (*p = ' ')//出錯(cuò)的地方 p++; if (*p = '-') { inter_symbol = inter_symbol*(-1); p++; }
while(*p>='0'&&*p<='9'&&*p!='\n') { inter_number = inter_number * 10 + (*p - '0'); p++; } return inter_number*inter_symbol; }

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調(diào)試了好久，才知道原來(lái)判斷語(yǔ)句的“==”寫成了“=”！！！切實(shí)記得這個(gè)錯(cuò)誤！！

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2、

#include
int my_atoi(char *str)
{
?char *p = str;//char *p; p = str;
?int inter_symbol = 1;
?int inter_number = 0;
?while (*p == ' ')
??p++;
?if (*p == '-')
?{
??inter_symbol =inter_symbol*(-1);
??p++;
?}
?if (*p == '+')
?{
??p++;
?}
?if (!(*p >= '0'&&*p <= '9'))
?{
??printf("開始符號(hào)為非數(shù)字字符，錯(cuò)誤返回。\n");
??return 0;
?}
?while (*p != '\0')
?{
??if (*p >= '0'&&*p<= '9')
??{
???inter_number= inter_number * 10 + (*p - '0');
???p++;
??}
??else
??{
???printf("字符串不完全是數(shù)字字符，返回部分?jǐn)?shù)字字符對(duì)應(yīng)的數(shù)字\n");
???returninter_number*inter_symbol;
??}
?}
?return inter_number*inter_symbol;
}

int main(void)
{
?char a[] = "1a2355";
?char b[] = "987653";
?int add1,add2,total;
?add1 = my_atoi(a);
?add2 = my_atoi(b);
?total = add1 + add2;
?printf("%d", total);
?getchar();
?return 0;
}

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