插入字符串，删除字符串——C语言描述
目录插入字符串，删除字符串——C语言描述0 测试用例框架1 插入字符串1.1功能需求：1.2 条件1.3方法1.4 代码实现
0 测试用例框架
https://blog.csdn.net/m0_59469991/article/details/127137119?csdn_share_tail=%7B%22type%22%3A%22blog%22%2C%22rType%22%3A%22article%22%2C%22rId%22%3A%22127137119%22%2C%22source%22%3A%22m0_59469991%22%7D
1 插入字符串
OP_STATUS StrInsert(char *Str, const unsigned int InSertPos, const char *InsertStr)
1.1功能需求：
在主串Str的第InSertPos个位置的后面插入子串InsertStr
1.2 条件
Str与InsertStr非空
0<=InSertPos<=StringLen(Str) + 1
1.3方法
①先调MoveBackStr函数，移动字符
OP_STATUS MoveBackStr(char *Str, const unsigned int Pos, const int MvLen)
Str为数移动主串的字符，Pos为要移动的位置，MvLen为移动的长度，值为InsertStr的长度
②调用CopyStrWhithoutTail函数，插入字串
OP_STATUS CopyStrWhithoutTail(char *Str, const unsigned int Pos, const char *CpyStr)
Str为数移动主串的字符，Pos为要移动的位置，CpyStr为要插入的子串。
1.4 代码实现
①MoveBackStr函数
OP_STATUS MoveBackStr(char *Str, const unsigned int Pos, const int MvLen) {
OP_STATUS Status = SUCCESS;
char *TraStr = Str;
unsigned int Index = 0;
int TraPos = Pos - 1;
unsigned int TraStrLen = StringLen(TraStr);
int TraMvLen = MvLen;
printf("MoveBackStr start\n");
if (TraStr == NULL || Pos > TraStrLen + 1) {
Status = INVALID_PARAMETER;
goto EXIT;
}
/*
Example 1:
Pos = 1
ab = 2
RepLen = 4
MvLen = 4 - 2 = 2
Pos
0 1 2 3 4 5
a b c \0
a b c \0
----------------------------
Example 2:
Pos = 2
bcde = 4
RepLen = 2
MvLen = 2 - 4 = -2
Pos
0 1 2 3 4 5 6
a b c d e f \0
a d e f \0
*/
if (TraMvLen > 0) {
for (Index = TraStrLen + 1 + TraMvLen; Index >= TraPos + TraMvLen; --Index) {
TraStr[Index] = TraStr[Index - TraMvLen];
}
} else if (TraMvLen < 0) {
TraMvLen = 0 - TraMvLen;
printf("TraMvLen = %d\n", TraMvLen);
for (Index = TraPos; Index <= TraStrLen + 1 - TraMvLen; ++Index) {
TraStr[Index] = TraStr[Index + TraMvLen];
}
}
printf("TraStr = %s\n", TraStr);
EXIT:
printf("MoveBackStr end\n");
return Status;
}
②CopyStrWhithoutTail函数
OP_STATUS CopyStrWhithoutTail(char *Str, const unsigned int Pos, const char *CpyStr) {
OP_STATUS Status = SUCCESS;
char *TraStr = Str;
char *TraCpyStr = CpyStr;
unsigned int TraPos = Pos - 1;
unsigned int TraStrLen = StringLen(TraStr);
unsigned int TraCpStrLen = StringLen(TraCpyStr);
unsigned int Index = 0;
printf("CopyStrWhithoutTail start\n");
if (TraStr == NULL || Pos > TraStrLen + 1) {
Status = INVALID_PARAMETER;
goto EXIT;
}
for (Index = TraPos; Index < TraPos + TraCpStrLen; ++Index) {
TraStr[Index] = *TraCpyStr;
++TraCpyStr;
}
//for (Index = TraPos; Index < TraPos + TraCpStrLen; ++Index) {
// *(TraStr + Index) = *TraCpyStr;
// ++TraCpyStr;
//}
printf("TraStr = %s\n", TraStr);
EXIT:
printf("CopyStrWhithoutTail end\n");
return Status;
}
③StrInsert函数
OP_STATUS StrInsert(char *Str, const unsigned int InSertPos, const char *InsertStr) {
OP_STATUS Status = SUCCESS;
char *TraStr = Str;
unsigned int TraInSertPos = InSertPos;
char *TraInserStr = InsertStr;
unsigned int TraInsertLen = StringLen(TraInserStr);
printf("StrInsert start\n");
if (TraStr == NULL || TraInSertPos > StringLen(TraStr) + 1 || InsertStr == NULL) {
Status = INVALID_PARAMETER;
goto EXIT;
}
printf("TraInsertLen = %d\n", TraInsertLen);
Status = MoveBackStr(TraStr, TraInSertPos, TraInsertLen);
printf("TraStr = %s\n", TraStr);
if (Status != SUCCESS) {
goto EXIT;
}
Status = CopyStrWhithoutTail(TraStr, TraInSertPos, TraInserStr);
printf("TraStr = %s\n", TraStr);
EXIT:
printf("StrInsert end\n");
return Status;
}
测试用例代码：
OP_STATUS StrInsert(char *Str, const unsigned int InSertPos, const char *InsertStr) {
OP_STATUS Status = SUCCESS;
char *TraStr = Str;
unsigned int TraInSertPos = InSertPos;
char *TraInserStr = InsertStr;
unsigned int TraInsertLen = StringLen(TraInserStr);
printf("StrInsert start\n");
if (TraStr == NULL || TraInSertPos > StringLen(TraStr) + 1 || InsertStr == NULL) {
Status = INVALID_PARAMETER;
goto EXIT;
}
printf("TraInsertLen = %d\n", TraInsertLen);
Status = MoveBackStr(TraStr, TraInSertPos, TraInsertLen);
printf("TraStr = %s\n", TraStr);
if (Status != SUCCESS) {
goto EXIT;
}
Status = CopyStrWhithoutTail(TraStr, TraInSertPos, TraInserStr);
printf("TraStr = %s\n", TraStr);
EXIT:
printf("StrInsert end\n");
return Status;
}
结果：
-------Test start----------
-------Test 01----------
SubString start
SubString end
Sub01 = a
StrCopmare start
Str1 = a
Str2 = a
ret = 0
StrCopmare end
StringCompareTest test succeed!
-------Test 02----------
SubString start
SubString end
Sub02 = bc
StrCopmare start
Str1 = bc
Str2 = bc
ret = 0
StrCopmare end
StringCompareTest test succeed!
-------Test result----------
Print test result;
TestNum = 2, PassNum = 2, FaildNum = 0