已知函数输入x值求y

Question

Answer 1

#include <stdio.h>
int main() {
int x,y=0;
scanf("%d",&x);
if(x<0){
y=x;
}
else if (x<10){
y=2x-1;
}
else if(x>=10){
y=3x-1;
}
printf("y=%d",y);
return 0;
}