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// 匿名传参,都是必传参数
void next1(int x,int y){
print('next1:');
print(x);
print(y);
}
// 具名传参 ,都是可选参数
void next2({int x, int y}){
print('next2:');
print(x);
print(y);
}
// 带有默认值的具名传参
void next3({int x = 1, int y = 2}){
print('next3:');
print(x);
print(y);
}
// 匿名和具名参数同时存在, x不传参的话会直接报错
void next4(int x,{int y=4}){
print('next4:');
print(x);
print(y);
}
void main() {
next1(1,2);
next2(x:1, y:2);
next3();
next4(1);
}
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