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|
package main
import (
"bufio"
"fmt"
"os"
"strconv"
)
func main() {
if len(os.Args) < 2 {
fmt.Fprintf(os.Stderr, "usage: %s datafile\n", os.Args[0])
os.Exit(1)
}
var i int = 0
var prev int = 0
var numlarger int = 0
file, err := os.Open(os.Args[1])
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
defer file.Close()
scanner := bufio.NewScanner(file)
for scanner.Scan() {
i += 1
if i == 1 {
continue
}
line, err := strconv.Atoi(scanner.Text())
if err != nil {
fmt.Fprintln(os.Stderr, err)
continue
}
if line > prev {
numlarger += 1
}
prev = line
}
if err := scanner.Err(); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
fmt.Printf("of %d lines, %d are greater\n", i, numlarger)
}
|
