rangerskm
Full Member level 4
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compiler used=gcc
os -fedora 19
i got the error message
os -fedora 19
Code:
#include <stdio.h>
#include <string.h>
#define MAXLINES 5000 /* max #lines to be sorted */
char *lineptr[MAXLINES]; /* pointers to text lines */
int readlines(char *lineptr[], int nlines);
void writelines(char *lineptr[], int nlines);
void qsort(char *lineptr[], int left, int right);
/* sort input lines */
main()
{
int nlines; /* number of input lines read */
if ((nlines = readlines(lineptr, MAXLINES)) >= 0) {
qsort(lineptr, 0, nlines-1);
writelines(lineptr, nlines);
return 0;
} else {
printf("error: input too big to sort\n");
return 1;
}
}
#define MAXLEN 1000 /* max length of any input line */
int getline(char *, int);
char *alloc(int);
/* readlines: read input lines */
int readlines(char *lineptr[], int maxlines)
{
int len, nlines;
char *p, line[MAXLEN];
nlines = 0;
while ((len = getline(line, MAXLEN)) > 0)
if (nlines >= maxlines || p = alloc(len) == NULL)
return -1;
else {
line[len-1] = '\0'; /* delete newline */
strcpy(p, line);
lineptr[nlines++] = p;
}
return nlines;
}
/* writelines: write output lines */
void writelines(char *lineptr[], int nlines)
{
int i;
for (i = 0; i < nlines; i++)
printf("%s\n", lineptr[i]);
}
i got the error message
[sathish@localhost ~]$ vi pointarr.c
[sathish@localhost ~]$ gcc pointarr.c
pointarr.c:29:8: error: conflicting types for ‘getline’
int getline(char *, int);
^
In file included from pointarr.c:1:0:
/usr/include/stdio.h:678:20: note: previous declaration of ‘getline’ was here
extern _IO_ssize_t getline (char **__restrict __lineptr,
^
pointarr.c: In function ‘readlines’:
pointarr.c:40:40: error: lvalue required as left operand of assignment
if (nlines >= maxlines || p = alloc(len) == NULL)