如何解决数组读取空格和控制字符
char str[100];
fgets(str,100,stdin);
int i;
int alpha=0;
int space=0;
int cntrl=0;
while(str[i])
{
if(isalpha(str[i]))
{
printf("%c is an alphabet\n",str[i]);
alpha++;
}
if(isspace(str[i]))
{
printf("%c is a whitespace\n",str[i]);
space++;
}
if(iscntrl(str[i]))
{
printf("%c is a control character\n",str[i]);
cntrL++;
}
}
printf("You have %d alphabet\n",alpha);
printf("Your input has %d whitespace\n",space);
printf("Your input has %d control character\n",cntrl);
即使我没有使用空格,它也总是显示一个空格也控制字符,我认为这与数组大小有关。我该如何解决?
解决方法
更改这一行:
while(str[i])
更正为:
while(str[i++])
您的完整代码:
char str[100];
fgets(str,100,stdin);
int i=0; // initialize here
int alpha=0;
int space=0;
int cntrl=0;
while(str[i++]) // increment after each loop
{
if(isalpha(str[i]))
{
printf("%c is an alphabet\n",str[i]);
alpha++;
}
if(isspace(str[i]))
{
printf("%c is a whitespace\n",str[i]);
space++;
}
if(iscntrl(str[i]))
{
printf("%c is a control character\n",str[i]);
cntrl++;
}
}
printf("You have %d alphabet\n",alpha);
printf("Your input has %d whitespace\n",space);
printf("Your input has %d control character\n",cntrl);
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