On Sat, Jan 28, 2023 at 8:05 AM yeshwanthchowdary jampala <
[email protected]> wrote:
> Hi everyone,
>
> I'm getting this error:
> 1)cannot use j (variable of type int) as type string in send
> 2)cannot use x (variable of type int) as type float32 in argument to
> comppricevalue
> 3)cannot use k (variable of type int) as type float32 in send
>
Those errors seem clear enough to me. Consider the first one. It is telling
you that at line 80 you are attempting to send an int on a channel you
defined as passing strings (from line 73: `job := make(chan string, 3)`).
If you want to pass integers through the channel change its creation to
`job := make(chan int, 3)`. Alternatively, change the channel send from this
for j := 1; j <= 9; j++ {
job <- j
}
to this
for j := 1; j <= 9; j++ {
job <- fmt.Sprintf("%d", j) // or strconv.Itoa(j)
}
Perhaps you were expecting Go to recognize the channel handled strings and
automatically convert the int to a string (similar to how C has implicit
type conversions). Go, for good reasons, does not do any implicit type
conversions other than for untyped constants (see
https://go.dev/ref/spec#Constants).
> Code:
> package main
>
> import (
> "fmt"
> "time"
> )
>
> type ClientOrder2 struct {
> Order_id int
> Account_id string
> Currency_symbol string
> Pricevalue float32
> SellorBuystatus string
> }
>
> var orders2 = []ClientOrder2{
> ClientOrder2{
> Order_id: 1,
> Account_id: "yesh123",
> Currency_symbol: "USD/EUR",
> Pricevalue: 70.001,
> SellorBuystatus: "sell",
> },
> ClientOrder2{
> Currency_symbol: "USD/INR",
> Pricevalue: 70.002,
> },
> ClientOrder2{
> Currency_symbol: "USD/EUR",
> Pricevalue: 71.003,
> },
> ClientOrder2{
> Currency_symbol: "USD/EUR",
> Pricevalue: 70.001,
> },
> }
>
> func compcurrency(id string, jobs <-chan string, results chan<- string)
> <-chan string {
> put := make(chan string, 4)
> go func() {
> for j := range jobs {
> for i := 0; i < 4; i++ {
> put <- j
> }
> fmt.Println("comparing pricevalues", id, "Market open:", j)
> time.Sleep(time.Second)
> results <- j
> }
> }()
> return put
> }
>
> func comppricevalue(id float32, jobs1 <-chan float32, results1 chan<-
> float32) <-chan float32 {
> putt := make(chan float32, 4)
> go func() {
> for k := range jobs1 {
> for i := 0; i < 4; i++ {
> putt <- k
> }
> fmt.Println("comparing pricevalues", id, "Market open:", k)
> time.Sleep(time.Second)
> results1 <- k
> }
> }()
> return putt
> }
>
> func main() {
> fmt.Println("program starting")
>
> fmt.Println(orders2)
>
> job := make(chan string, 3)
> result := make(chan string, 3)
>
> for w := "a"; w <="f"; {
> go compcurrency(w, job, result)
> }
> for j := 1; j <= 9; j++ {
> job <- j
> }
> close(job)
> for a := 1; a <= 9; a++ {
> <-result
> }
>
> job1 := make(chan float32, 3)
> result1 := make(chan float32, 3)
>
> for x := 1; x <= 2; x++ {
> go comppricevalue(x, job1, result1)
> }
> for k := 1; k <= 9; k++ {
> job1 <- k
> }
> close(job1)
> for a := 1; a <= 9; a++ {
> <-result1
> }
> }
>
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> .
>
--
Kurtis Rader
Caretaker of the exceptional canines Junior and Hank
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