字符转换为数字，以|分割

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#include <stdio.h>
#include <stdlib.h>

#define INT_MAX ((1<<31)-1)
#define INT_MIN (1<<31)

#define isRight(x) (x==' ' || x=='+' || x=='-' || (x>='0'&&x<='9'))
int getNum(char* s, int begin, int end)
{
    int flag = 1;
    int num = 0;
    
    while (begin<=end && s[begin] == ' ')
        begin++;

    if (s[begin] == '-')
    {
        flag = -1;
        begin++;
    }
    
    if (s[begin] == '+')
        begin++;

        
    while (begin<=end)
    {
        if (s[begin]<'0' || s[end]>'9')
        {
            return 0;
        }
        if (num>INT_MAX/10 || (INT_MAX==INT_MAX/10 && (s[begin]-'0')>INT_MAX%10))
            return (flag==-1) ? INT_MIN : INT_MAX;

        num = num*10+s[begin]-'0';
        begin++;
    }

    return num*flag;
}

/*以|分隔符的数值转换 一面*/
void strToNum(char* s)
{
    int a[20];
    int i = 0;
    int begin;
    int end;
    int count = 0;
    
    if (s == NULL)
        return;
        
    while (s[i]!='\0' && s[i]=='|')
        i++;
        
    while (s[i] != '\0')
    {
        begin = i;
        while (s[i]!='\0' && s[i]!='|' && isRight(s[i]))
        {
            i++;
        }
        if (s[i]=='\0' || s[i]=='|')
        {
            end = i-1;
            a[count++] = getNum(s, begin, end);
            printf("a[%d] %d\n", count-1, a[count-1]);
        }
        else
        {
            while (s[i]!='\0' && s[i]!='|')
            {
                i++;
            }
            if (s[i] == '\0')
                return;
        }
        i++;
    }
}


int main()
{
    char s[] = "111111|-123213|dsafd| adf | -123123213213123|adaew|12334243243243";
    strToNum(s);
    //printf("max int  %d, min int %d\n", INT_MAX, INT_MIN);
    return 0;
}

字符转换为数字，以|分割

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原文地址：http://blog.csdn.net/yuanwei1314/article/details/44103149