运行环境：macOS shell
代码：
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define ALL 1
#define SINGLE 0
int str2num(char *str); //字符串转宏
void Find(const char *src, char *argv, int Mode, int *position); //查找函数
char *Replace(char *src, char *argv, char *replace, int Mode, int *position); //替换函数
void atoA(char *src); //小写转大写
void PrintInfo(void); //打印提示信息
void ArrayReverse(int *array); //数组倒置---冒泡实现
int main ()
{
char string[1024] = "This year is Chinese new year---the year of the rooster, and happy new year to you!";
char keyword[15] = {0};
char mode[10] = {0}, M[10] = {0}, replace[15] = {0};
int pos[10] = {0};
int i,count = 0;
int len;
int argvlen;
PrintInfo();
printf("\n\nTest String :\n");
printf("%s\n\n", string);
printf("Please input your find or repalce keyword : ");
scanf("%[^\n]",keyword);
getchar();
printf("Please chose the mode --- \"ALL or SINGLE\": ");
scanf("%[^\n]",mode);
atoA(mode);
/* while input error, resume load up to correct. */
while ( (strcmp(mode, "ALL") != 0) && (strcmp(mode, "SINGLE") != 0) )
{
printf("Line %d : Input Mode Error! Sample : all or ALL or single or SINGLE!\n", __LINE__);
printf("Resume Mode : ");
getchar();
scanf("%[^\n]",mode);
atoA(mode);
}
printf("Debug %d : mode --- %s\n",__LINE__, mode);
getchar();
printf("Please chose the mode --- \"FIND or REPLACE\" : ");
scanf("%[^\n]",M);
atoA(M);
// printf("Debug %d : mode --- %s\n",__LINE__, mode);
/* while input error, resume load up to correct. */
while ( (strcmp(M, "FIND") != 0) && (strcmp(M, "REPLACE") != 0) )
{
printf("Line %d : Input Mode Error! Sample : find or FIND or replace or REPLACE!\n", __LINE__);
printf("Resume Mode : ");
getchar();
scanf("%[^\n]",M);
atoA(M);
}
// printf("Debug %d : M --- %s\n",__LINE__, M);
// printf("Debug %d : mode --- %s\n",__LINE__, mode);
if (strcmp(M, "REPLACE") == 0)
{
printf("Please input your replace keyword : ");
getchar();
scanf("%[^\n]",replace);
}
// printf("Debug %d : mode --- %s\n",__LINE__, mode);
// printf("Debug %d : replace --- %s\n",__LINE__, replace);
len = (int)strlen(string);
argvlen = (int)strlen(keyword);
Find(string, keyword, str2num(mode), pos);
if (strcmp(M, "FIND") == 0)
{
for (i = 0; i < len; i ++)
{
if (pos[count] != -1 && pos[count] != -2 && i == pos[count])
{
printf("\e[1;30;47m%s\e[m",keyword);
i += argvlen - 1;
count ++;
}
else
{
printf("%c",string[i]);
}
}
printf("\n");
}
else if (strcmp(M, "REPLACE") == 0)
{
count = 0;
Replace(string, keyword, replace, str2num(mode), pos);
len = (int)strlen(string);
argvlen = (int)strlen(replace);
for (i = 0; i < len; i ++)
{
if (pos[count] != -1 && pos[count] != -2 && i == pos[count])
{
printf("\e[1;30;47m%s\e[m",replace);
i += argvlen - 1;
count ++;
}
else
{
printf("%c",string[i]);
}
}
printf("\n");
}
return 0;
}
void PrintInfo(void)
{
printf("******************************************\n");
printf("* Find and Repalce Test *\n");
printf("* Sample : <KeyWord> <Mode> <M> *\n");
printf("* Mode : ALL or SINGLE *\n");
printf("* M : FIND or REPALCE *\n");
printf("******************************************\n");
}
int str2num(char *str)
{
int num = 2;
if (strcmp(str, "ALL") == 0)
num = 1;
else if (strcmp(str, "SINGLE") == 0)
num = 0;
return num;
}
void Find(const char *src, char *argv, int Mode, int *position)
{
int i,j,len,argvlen;
int count = 0;
len = (int)strlen(src);
argvlen = (int)strlen(argv);
switch(Mode)
{
case SINGLE:
if (strstr(src, argv) != NULL)
*position++ = (int)(strstr(src, argv) - src);
else
*position++ = -1;
break;
case ALL:
for (i = 0; i < len; i ++)
{
if (src[i] == argv[0])
{
for (j = 1; j < argvlen; j ++)
{
if (src[i+j] == argv[j])
{
count ++;
}
}
if (count == argvlen - 1)
{
*position++ = i;
i += argvlen - 1;
count = 0;
}
}
}
break;
default:
printf("Line %d : Mode Error! Sample : \"ALL or SINGLE!\"\n",__LINE__);
exit(1);
break;
}
*position ++ = -2;
}
char *Replace(char *src, char *argv, char *replace, int Mode, int *position)
{
char *p = src;
int *posi = position;
int len, argvlen,repalcelen,i,j,posm;
len = (int)strlen(src);
argvlen = (int)strlen(argv);
repalcelen = (int)strlen(replace);
switch(Mode)
{
case SINGLE:
if (*position != -1 && *position != -2)
{
if (argvlen == repalcelen)
{
for (i = 0; i < argvlen; i ++)
{
src[(*position) + i] = replace[i];
}
}
else if (argvlen > repalcelen)
{
posm = argvlen - repalcelen - 1;
for (i = 0; i < repalcelen; i ++)
{
src[(*position) + i] = replace[i];
for (j = *position + repalcelen; src[j]; j ++)
{
src[j] = src[j + posm];
}
}
}
else
{
posm = repalcelen - argvlen;
len = (int)strlen(src);
for (i = len; i >= *position; i --)
src[i + posm] = src[i];
for (i = 0; i < repalcelen; i ++)
src[(*position) + i] = replace[i];
}
}
else
{
printf("Line %d : No keyword to repalce!!\n",__LINE__);
}
break;
case ALL:
if (*position != -1 && *position != -2)
{
if (argvlen == repalcelen)
{
while(*position != -2)
{
for (i = 0; i < argvlen; i ++)
{
src[(*position) + i] = replace[i];
}
position ++;
}
}
else if (argvlen > repalcelen)
{
ArrayReverse(position);
for (i = 0; i < 6; i ++)
printf("%d ", position[i]);
printf("\n");
posm = argvlen - repalcelen - 1;
while (*position != -2)
{
for (i = 0; i < repalcelen; i ++)
{
src[(*position) + i] = replace[i];
for (j = *position + repalcelen; src[j]; j ++)
{
src[j] = src[j + posm];
}
}
position ++;
}
}
else
{
posm = repalcelen - argvlen;
ArrayReverse(position);
while (*position != -2)
{
len = (int)strlen(src);
for (i = len; i >= *position; i --)
src[i + posm] = src[i];
for (i = 0; i < repalcelen; i ++)
src[(*position) + i] = replace[i];
position ++;
}
}
}
else
{
printf("Line %d : No keyword to repalce!!\n",__LINE__);
}
break;
default:
printf("Line %d : Mode Error! Sample : \"ALL or SINGLE!\"\n", __LINE__);
exit(1);
break;
}
Find(src, replace, Mode, posi);
return p;
}
/*小写字符转大写字符*/
void atoA(char *src)
{
while (*src != '\0')
{
if (*src >= 'a' && *src <= 'z')
*src -= 32;
src ++;
}
}
void ArrayReverse(int *array)
{
int count = 0,i,j,tmp;
while (array[count] != -2)
count ++;
for (i = count; i >= 0; i --)
{
for (j = 0; j < i-1; j ++)
{
tmp = array[j];
array[j]= array[j+1];
array[j+1] = tmp;
}
}
}
运行结果：
