80 colonnes on a dit

outini_en_80_colonnes.c

#include <stdio.h>
int maxline=80;
int main(int argc, char* argv[])
{
    char line[2048];
    if( (argc>1) && (atoi(argv[1])>0) ) maxline=atoi(argv[1]);
    while(fgets(line,sizeof(line),stdin)) {
        line[maxline]='\0'; printf("%s\n",line);
    }
}

@outini il dit sed 's/^\(.\{80\}\).*/\1/'

awk '{ print substr($0, 0, 81) }'
sed 's/^\(................................................................................\).*/\1/'
sed "s/^\($(perl -e "print '.' x 80")\).*/\1/"
fold -w 80
cut -c 1-80```