#include <stdio.h>

char *ft_strupcase(char *str) {
    char *ptr = str;

    while (*str) {
        *str -= 32;
        str++;
    }

    return ptr;
}

int main() {
    char chaine[] = "bonjour";

    printf("%s\n", chaine);

    char *resultat = ft_strupcase(chaine);

    printf("%s", resultat);

    return 0;
}

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