Question

我有一个名为tablolar的字符串变量，在这种情况下，它的值是“tablo2”，根据我的意图，它不能输入if语句，但它进入，我无法找到原因。

for(int z=0;z<tablolar.size();){
    if((tablolar[z]==',')||(tablolar[z]=='a')||(tablolar[z]=='b')
     ||(tablolar[z]=='c')||(tablolar[z]=='d')||(tablolar[z]=='e')
     ||(tablolar[z]=='f')||(tablolar[z]=='g')||(tablolar[z]=='h')
     ||(tablolar[z]=='i')||(tablolar[z]=='j')||(tablolar[z]=='k')
     ||(tablolar[z]=='l')||(tablolar[z]=='m')||(tablolar[z]=='n')
     ||(tablolar[z]=='o')||(tablolar[z]=='p')||(tablolar[z]=='q')
     ||(tablolar[z]=='r')||(tablolar[z]=='s')||(tablolar[z]=='t')
     ||(tablolar[z]=='u')||(tablolar[z]=='v')||(tablolar[z]=='w')
     ||(tablolar[z]=='x')||(tablolar[z]=='y')||(tablolar[z]=='z')) {
    //enters here but it must not enter
}

Answer 1

您的检查包括检查当前符号是否为't'，如果字符串为'tablo2'，则其第一个字符为't'。

顺便说一句，这项检查可以更加简单：

if ((tablolar[z] == ',') || (tablolar[z] >= 'a' && tablolar[z] <= 'z'))
    // do your work

数字char和字母char之间的c ++字符比较

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