Tabelle in C mit ASCI?

Hallo wollte fragen wie man in C eine Tabelle mit ASCII Zeichen ausgibt?

Danke!

Answer 1

[Habenulae]

for (char c = ' '; c <= '~'; ++c) {
  printf("'%c': 0x%02X\n", c, (int)c);
}

Answer 2

[Isendrak]

Sehr schön, deine Frage hat mir knapp eine Stunde Langeweile erspart. ^^

Und schon gehts los:

Zuerst mal der passende Header (table.h):

#ifndef TABLE_H_F657844E41F822BDAA0A94658630DA0AE98A63EBEA20F1BF9CD0EBF14D1B86EE232AA03C697D226D4B20343FB8F113F675881835114EEAB15EF8FF499A3E2DE2
#define TABLE_H_F657844E41F822BDAA0A94658630DA0AE98A63EBEA20F1BF9CD0EBF14D1B86EE232AA03C697D226D4B20343FB8F113F675881835114EEAB15EF8FF499A3E2DE2
struct table;
typedef struct table table;

table *table_create(int rows, int cols);
char *table_put(table *tbl, int row, int col, const char *data);
void table_print(const table *tbl);
void table_destroy(table *tbl);
#endif /*TABLE_H_F657844E41F822BDAA0A94658630DA0AE98A63EBEA20F1BF9CD0EBF14D1B86EE232AA03C697D226D4B20343FB8F113F675881835114EEAB15EF8FF499A3E2DE2*/

Dann die Implementierung (table.c):

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

#include "table.h"

struct table{
    char ***data;
    int cols, rows;
};

static inline int max(int a, int b){
    if(a > b) return a;
    return b;
}

void table_print(const table *tbl){
    int width[tbl->cols];
    for(int col = 0; col < tbl->cols; ++col) width[col] = 0;
    for(int row = 0; row < tbl->rows; ++row){
        for(int col = 0; col < tbl->cols; ++col){
            if(!tbl->data[row][col]) continue;
            width[col] = max(strlen(tbl->data[row][col]), width[col]);
        }
    }
    char fmt[tbl->cols][10];
    for(int col = 0; col < tbl->cols; ++col)
        sprintf(fmt[col], "%%-%ds", width[col]);
    printf("+");
    for(int col = 0; col < tbl->cols; ++col){
        for(int n = 0; n < width[col]; n++){
            printf("-");
        }
        printf("+");
    }
    printf("\n");
    for(int row = 0; row < tbl->rows; ++row){
        printf("|");
        for(int col = 0; col < tbl->cols; ++col){
            if(!tbl->data[row][col]) printf(fmt[col], "");
            else printf(fmt[col], tbl->data[row][col]);
            printf("|");
        }
        printf("\n");
        printf("+");
        for(int col = 0; col < tbl->cols; ++col){
            for(int n = 0; n < width[col]; n++){
                printf("-");
            }
            printf("+");
        }
        printf("\n");
    }
}

table *table_create(int rows, int cols){
    table *tbl = malloc(sizeof(table));
    if(!tbl) return 0;
    tbl->data = malloc(sizeof(char**)*rows);
    if(!tbl->data){
        free(tbl);
        return 0;
    }
    tbl->rows = rows;
    tbl->cols = cols;
    for(int row = 0; row < rows; row++){
        tbl->data[row] = malloc(sizeof(char*)*cols);
        if(!tbl->data[row]){
            table_destroy(tbl);
            return 0;
        }
        for(int col = 0; col < cols; ++col){
            tbl->data[row][col] = 0;
        }
    }
    return tbl;
}

void table_destroy(table *tbl){
    for(int row = 0; row < tbl->rows; row++){
        if(!row) continue;
        for(int col = 0; col < tbl->cols; ++col){
            if(tbl->data[row][col]) free(tbl->data[row][col]);
        }
        free(tbl->data[row]);
    }
    free(tbl->data);
    free(tbl);
}

char *table_put(table *tbl, int row, int col, const char *data){
    int data_len = strlen(data);
    if(!tbl->data[row][col]){
        tbl->data[row][col] = malloc(sizeof(char) * (data_len + 1));
        if(!tbl->data[row][col]) return 0;
    }
    else{
        char *tmp = realloc(tbl->data[row][col], sizeof(char) * (data_len + 1));
        if(!tmp) return 0;
    }
    memcpy(tbl->data[row][col], data, data_len + 1);
    return tbl->data[row][col];
}

char *table_get(table *tbl, int row, int col){
    return tbl->data[row][col];
}

Und noch ein kleines Testprogramm (table_test.c):

#include "table.h"

int main(int argc, char *argv[]){
    int rows = 4, cols = 3;
    table *tbl = table_create(rows, cols);
    table_put(tbl, 0, 0, "foo");
    table_put(tbl, 0, 1, "bar");
    table_put(tbl, 1, 2, "fizz");
    table_put(tbl, 3, 0, "buzz");
    table_print(tbl);
    table_destroy(tbl);
}

Ausgabe diese Testprogramms:

+----+---+----+
|foo |bar|    |
+----+---+----+
|    |   |fizz|
+----+---+----+
|    |   |    |
+----+---+----+
|buzz|   |    |
+----+---+----+

Woher ich das weiß: Hobby