Question

How to convert multiple <br/> tags to a single <br/> tag in C

Answer 1

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

void replace_multiple_br(char *input) {
    char temp[1024] = "";
    char *src = input;
    char *dst = temp;
    const char *br = "<br/>";
    size_t br_len = strlen(br);
    int prev_was_br = 0;

    while (*src) {
        if (strncmp(src, br, br_len) == 0) {
            if (!prev_was_br) {
                memcpy(dst, br, br_len);
                dst += br_len;
                prev_was_br = 1;
            }
            src += br_len;
        } else {
            *dst++ = *src++;
            prev_was_br = 0;
        }
    }

    *dst = '\0';
    strcpy(input, temp);
}

int main() {
    char input[] = "ab<br/><br/>cd<br/>efg<br/><br/><br/>hijk<br/><br/>";
    
    replace_multiple_br(input);
    
    printf("%s\n", input);

    return 0;
}


/*
run:

ab<br/>cd<br/>efg<br/>hijk<br/>

*/

 

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