C#字符串自增自減算法詳解
C#實(shí)現(xiàn)字符串自增和自減運(yùn)算,供大家參考,具體內(nèi)容如下
1.數(shù)字從 0-9 變化;
2.字母從 A-Z、a-z 變化;
3.其它字符跳過(guò);
4.以上變化依據(jù)其Ascii碼值;
/// <summary> /// 字符串運(yùn)算 /// </summary> public class StringOperation { /// <summary> /// 通過(guò)ASCII碼值,對(duì)字符串自增1 /// </summary> /// <param name="pStr">輸入字符串</param> /// <returns></returns> public static string StringIncreaseOne(string pStr) { var vRetStr = pStr; if (0 == pStr.Length) { vRetStr = "1"; } else { // 將最后一個(gè)字符與之前的字符串分開 string vOtherStr = pStr.Substring(0, pStr.Length - 1); int vIntChar = (int)pStr[pStr.Length - 1]; //轉(zhuǎn)ASCII碼值 if (48 <= vIntChar && vIntChar <= 57) //是數(shù)字(0 - 9) { vIntChar++; //自增1 if (vIntChar == 58) // 進(jìn)一位 { vIntChar = 48; vOtherStr = StringIncreaseOne(vOtherStr); } } else if (65 <= vIntChar && vIntChar <= 90) //是字母(A - Z) { vIntChar++; //自增1 if (vIntChar == 91) { vIntChar = 65; vOtherStr = StringIncreaseOne(vOtherStr); } } else if (97 <= vIntChar && vIntChar <= 122) //是字母(a - z) { vIntChar++; //自增1 if (vIntChar == 123) { vIntChar = 97; vOtherStr = StringIncreaseOne(vOtherStr); } } else // 其它字符 -> 跳過(guò) { vOtherStr = StringIncreaseOne(vOtherStr); } vRetStr = vOtherStr + (char)vIntChar; } return vRetStr; } /// <summary> /// 通過(guò)ASCII碼值,對(duì)字符串自減1 /// </summary> /// <param name="pStr">輸入字符串</param> /// <returns></returns> public static string StringReducingOne(string pStr) { var vRetStr = pStr; if (0 == pStr.Length) { vRetStr = "9"; } else { string vOtherStr = pStr.Substring(0, pStr.Length - 1); int vIntChar = (int)pStr[pStr.Length - 1]; //轉(zhuǎn)ASCII碼值 if (48 <= vIntChar && vIntChar <= 57) //是數(shù)字(0 - 9) { vIntChar--; if (vIntChar == 47) { vIntChar = 57; vOtherStr = StringReducingOne(vOtherStr); } } else if (65 <= vIntChar && vIntChar <= 90) //是數(shù)字(A - Z) { vIntChar--; if (vIntChar == 64) { vIntChar = 90; vOtherStr = StringReducingOne(vOtherStr); } } else if (97 <= vIntChar && vIntChar <= 122) //是數(shù)字(a - z) { vIntChar--; if (vIntChar == 96) { vIntChar = 122; vOtherStr = StringReducingOne(vOtherStr); } } else // 其它字符 -> 跳過(guò) { vOtherStr = StringReducingOne(vOtherStr); } vRetStr = vOtherStr + (char)vIntChar; } return vRetStr; } /// <summary> /// 通過(guò)ASCII碼值,對(duì)字符串自增 /// </summary> /// <param name="pStr">輸入字符串</param> /// <param name="pCount">自增個(gè)數(shù)</param> /// <returns></returns> public static string StringIncrease(string pStr, int pCount) { string vRetStr = pStr; for (int i = 0; i < pCount; i++) { vRetStr = StringIncreaseOne(vRetStr); } return vRetStr; } /// <summary> /// 通過(guò)ASCII碼值,對(duì)字符串自減 /// </summary> /// <param name="pStr">輸入字符串</param> /// <param name="pCount">自減個(gè)數(shù)</param> /// <returns></returns> public static string StringReducing(string pStr, int pCount) { string vRetStr = pStr; for (int i = 0; i < pCount; i++) { vRetStr = StringReducingOne(vRetStr); } return vRetStr; } }
以上就是本文的全部?jī)?nèi)容,希望對(duì)大家的學(xué)習(xí)有所幫助,也希望大家多多支持腳本之家。

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