在C中更改字串中特定字符的顏色-有解無憂

假設我在字串中有一些 ASCII 藝術作為變數表示，如下所示：

    char LOGO[3][40] = {
    "   /$$    /$$                       ",
    "  | $$   |__/                       ",
    " /$$$$$$  /$$/$$$$$$$ /$$   /$$     ",

我想$在終端中專門用綠色顯示。這樣做的經典方法是在$. 不幸的是，這是不可行的，因為我有超過三行的這個字串，手動這樣做會很累。

有沒有更可行的方法來改變字串中特定字符的顏色？

TIA

uj5u.com熱心網友回復：

如果您的目標是在終端上生成綠色字符，則無需更改徽標的定義，只需測驗字符并按要求輸出轉義序列即可：

#include <stdio.h>

char const LOGO[3][40] = {
    "   /$$    /$$                       ",
    "  | $$   |__/                       ",
    " /$$$$$$  /$$/$$$$$$$ /$$   /$$     ",
};

int main() {
    int green = 0;
    for (size_t row = 0; row < sizeof(LOGO) / sizeof(LOGO[0]); row  ) {
        for (size_t col = 0; col < sizeof(LOGO[0]) / sizeof(LOGO[0][0]); col  ) {
            char c = LOGO[row][col];
            if (c == '$') {
                if (!green) {
                    green = 1;
                    printf("\033[32m");
                }
            } else {
                if (green) {
                    green = 0;
                    printf("\033[0m");
                }
            }
            putchar(c);
        }
        if (green) {
            green = 0;
            printf("\033[0m");
        }
        putchar('\n');
    }
    return 0;
}

uj5u.com熱心網友回復：

不確定具有可用宏的解決方案，但具有額外功能的低效解決方案如下：

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

#define ORIG_CHAR   "$"    
#define GREEN_CHAR   "\033[32m$\033[0m"     

#define NEW_STRING(n) str_replace( n, ORIG_CHAR, GREEN_CHAR)
      
char LOGO[3][40] = {
"   /$$    /$$                       ",
"  | $$   |__/                       ",
" /$$$$$$  /$$/$$$$$$$ /$$   /$$     ",
};  

  // You must free the result if result is non-NULL.
char *str_replace(char *orig, char *rep, char *with) {
    char *result; // the return string
    char *ins;    // the next insert point
    char *tmp;    // varies
    int len_rep;  // length of rep (the string to remove)
    int len_with; // length of with (the string to replace rep with)
    int len_front; // distance between rep and end of last rep
    int count;    // number of replacements

    if (!orig || !rep)
        return NULL;
    len_rep = strlen(rep);
    if (len_rep == 0)
        return NULL; 
    if (!with)
        with = "";
    len_with = strlen(with);

    ins = orig;
    for (count = 0; tmp = strstr(ins, rep);   count) {
        ins = tmp   len_rep;
    }

    tmp = result = malloc(strlen(orig)   (len_with - len_rep) * count   1);

    if (!result)
        return NULL;

    while (count--) {
        ins = strstr(orig, rep);
        len_front = ins - orig;
        tmp = strncpy(tmp, orig, len_front)   len_front;
        tmp = strcpy(tmp, with)   len_with;
        orig  = len_front   len_rep; // move to next "end of rep"
    }
    strcpy(tmp, orig);
    return result;
}
  
void main(){
    for(int ii=0; ii < sizeof(LOGO)/40; ii  )
        printf("%s\n", NEW_STRING(LOGO[ii]));
}

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