效果圖
masonry
使用陣列來自動約束
nsarray *buttonarrayone = @[_buttonac, _buttonleftbracket, _buttonrightbracket, _buttondivide];
//withfixedspacing: 每個view中間的間距
//leadspacing: 左最開始的間距
//tailspacing:; 右邊最後的的間距
[buttonarrayone mas_distributeviewsalongaxis:masaxistypehorizontal withfixedspacing:15 leadspacing:15 tailspacing:15];
[buttonarrayone mas_makeconstraints:^(masconstraintmaker *make) ];
對最後一行單獨處理
[_buttonzero mas_makeconstraints:^(masconstraintmaker *make) ];
[_buttonzero.titlelabel mas_makeconstraints:^(masconstraintmaker *make) ];
//使0的數字對齊
計算部分:
+ (result)calculatefor:(char*) formula andlen: (long) length ;
int numberofdots = 0;
int index;
int digitsnum = 0;
float digits[calculate_max_digits];
memset(digits, 0, sizeof(digits));
int optnum = 0;
char operator[calculate_max_operator];
memset(operator, 0, sizeof(operator));
int digitnum = 0;
char digit[calculate_max_digit];
memset(digit, 0, sizeof(digit));
char *p = formula;
while (length--) else else if (0 == digitnum || calculate_max_digits == digitsnum - 1) else
digitnum = 0;
operator[optnum++] = *p;
}break;
case '(': else if (')' == *p)
if (1 == existend)
p++;
}result result_son = [self calculatefor:pointer_son andlen:p - pointer_son];
if (calculate_err == result_son.error)
digits[digitsnum++] = result_son.value;
memset(digit, 0, sizeof(digit));
digitnum = -1;
break;
}case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
case '.':
digit[digitnum++] = *p;
www.cppcns.com if (numberofdots == 0 && *p == '.') else if (numberofdots == 1 && *p == '.')
break;
d程式設計客棧efault:
程式設計客棧 result.error = calculate_err;
return result;
}if (0 == length && 0 < digitnum)
p ++;
}if (digitsnum != optnum + 1)
for (index = 0; index < optnum; index ++) else if ('/' == operator[index])
digits[index + 1] = digits[index] / digits[index + 1];
digits[index] = 0;
operator[index] = '?';}}
for (index = 0; index < optnum; index ++) else }}
result.value = digits[0];
for (index = 0; index < optnum; i ++) else if ('-' == operator[index])
}return result;
}本文標題: ios開發實現計算器功能
本文位址:
python 實現計算器功能
開發乙個簡單的python計算器 實現加減乘除及拓號優先順序解析 使用者輸入 1 2 60 30 40 5 9 25 3 7 399 42998 10 568 14 43 16 32 等類似公式後,必須自己解析裡面的 符號和公式 不能呼叫eval等類似功能偷懶實現 運算後得出結果,結果必須與真實的計...
C 實現計算器功能
注意 判斷數值和表示式 的合理性。include include include define max len 200 判斷字元是否合理 0 9 bool checkinput char c if c 0x2e c 0x2b c 0x2d c 0x2a c 0x2f return false boo...
iOS實現小型計算器
步驟 1.開啟xcode,單機creat a new xcode project 3.填寫專案名稱單機next 4.viewcontroller.h中定義成員和方法 import inte ce viewcontroller uiviewcontroller property retain,nona...