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#include <stdio.h>
#include <stdlib.h>
#define MAXLEN 1000
void getstr(char s[]);
void fold(char to[], char from[], int n);
/* folds long input */
int main(int argc, char *argv[]) {
char s[MAXLEN], f[MAXLEN];
printf("Enter some text and press ctrl+d to wrap text\n");
getstr(s);
fold(f, s, atoi(argv[1]));
printf("\n%s\n", f);
return 0;
}
void getstr(char s[]) {
int i, c;
for (i = 0; i < MAXLEN - 1 && (c = getchar()) != EOF; i++)
s[i] = c;
s[i] = '\0';
}
void fold(char to[], char from[], int n) {
int i, j, len, blank;
char c;
len = 0;
for (i = 0, j = 0; j < MAXLEN - 1 && (c = from[i]) != '\0'; i++) {
blank = c == ' ' || c == '\t';
if (len == 0 && blank)
continue;
if (len >= n) {
if (!blank) {
to[j++] = '\n';
len = 0;
}
}
to[j++] = c;
len++;
}
to[j] = '\0';
}
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