本文介绍了如何防止用户在语言C中输入超过2个小数位的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

例如,由于超过2.dp,这是不允许2.00000,但这是2.00

我有一个代码,它打破了价值,只有.000或.00取决于数字。而我正在考虑创造一个条件,如果它大于.99。

但它不起作用



我尝试过:



 int Substring(char string [])
{
int i; int lengt; int index;
// char string [5],
char sub [1000];
int position,length,c = 0;

// printf(输入字符串\ n);
//得到(字符串);
printf(%s,string);

lengt = strlen(string);
for(i = 1; i< lengt; i ++)
{

// if(。== string)
// {
// printf(错误请用dot \\\
重新输入你的值);
//休息;
//}
if('。'== string [i])
{
index = i;
printf(%d:%d \ n,index,lengt);
//休息;

}
}
// printf(%d,lengt);
position = index;
length = lengt;

// printf(输入子串的位置和长度\ n);
// scanf(%d%d,& position,& length);

while(c< length){
sub [c] = string [position + c];
c ++;
}
sub [c] ='\'';

printf(必需的子串是\%s \\ n,sub);
system(暂停);
返回0;
}
解决方案



For example this is not allowed 2.00000 due to its over 2.d.p but this is 2.00
I have a code below that breaks the value and only how .000 or .00 depends on the number. And i was thinking of creating a condition such as if its greater than .99.
But it doesnt work

What I have tried:

int Substring(char string[]) 
{
int i; int lengt; int index;
   //char string[5], 
   char sub[1000];
   int position, length, c = 0;
 
   //printf("Input a string\n");
   //gets(string);
   printf("%s",string);
 
   lengt=strlen(string);
   for(i=1;i<lengt;i++)
   {
                     
                  //   if("."==string)
                  // {
                  //printf("error please re-type your value with a dot\n");
                  //break;
                  //}
                      if('.'==string[i])
                     {
                          index=i;
                          printf("%d : %d \n",index,lengt);
                          //break;
                          
                     }
   }
   //printf("%d",lengt);
   position=index;
   length=lengt;
   
   //printf("Enter the position and length of substring\n");
   //scanf("%d%d", &position, &length);
 
   while (c < length) {
      sub[c] = string[position+c];
      c++;
   }
   sub[c] = '\0';
 
   printf("Required substring is \"%s\"\n", sub);
 system("pause");
   return 0;
}
解决方案




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10-19 05:21