python和C语言的互转

Python转C语言

para = "Letting go of a negative habit happens by making one positive choice at a time. " \
       "Creating a desired achievement comes about in the same way."

para = para.split()
arr = []
num_a = 0
word_num = 0
word_line = 0
count_line = 0
max_line = 72

for p in para:
    if p == 'a':
        p = "//"+p+"//"
        num_a += 1
    word_num += 1
    word_line = len(p)
    count_line += word_line
    arr.append(p)

arr = ' '.join(arr)
print(arr)

输出是

Letting go of //a// negative habit happens by making one positive choice at //a// time. Creating //a// desired achievement comes about in the same way.

判断句子中的a即可

#include <stdio.h>
#include <string.h>
int main()
{
    char t[]={"Letting go of a negative habit happens by making one positive choice at a time. " 
       "Creating a desired achievement comes about in the same way."};
    int len=strlen(t);
    for(int i=0;i<len;i++)
    {
        if(t[i]=='a'&&i-1>0&&i+1<len-1)
        {
            if(t[i-1]==' '&&t[i+1]==' ')
            {
                printf("//%c//",t[i]);
            }
            else
            {
                printf("%c",t[i]);
            }
        }
        else
        {
            printf("%c",t[i]);
        }
    }
    printf("\n");
    return 0;
}

#include <stdio.h>
#include <string.h>

int main()
{
    char para[] = "Letting go of a negative habit happens by making one positive choice at a time. "
                  "Creating a desired achievement comes about in the same way.";
    int num_a = 0;
    int word_num = 0;
    int word_line = 0;
    int count_line = 0;
    int max_line = 72;
    char *p = strtok(para, " ");
    while (p)
    {
        if (strcmp(p, "a") == 0)
        {
            printf("//%s// ", p);
            num_a++;
            word_line += 5;
        }
        else
        {
            printf("%s ", p);
            word_line += strlen(p);
        }
        word_num++;
        count_line += word_line;
        p = strtok(NULL, " ");
    }
    return 0;
}

只要修改a字符内容，不用那么麻烦，只需要找到特征字串" a "，然后输出为" //a// "即可

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main()
{
   char para[] = "Letting go of a negative habit happens by making one positive choice at a time. "
                  "Creating a desired achievement comes about in the same way.";
   char findstr[] = " a ";
   char replacestr[] = " //a// ";
   int len = strlen(para);
   int i=0;
   for(i=0;i<len-3;i++)
   {
       if(memcmp(para+i,p,3) == 0)
       {
           printf("%s",replacestr);
           i+=2;
       }
       else
           printf("%c",para[i]);
   }
   printf("%s",para+len-3);
   return 0;
}