@FILE和@TEXT文本文件输入输出-lingo教程

@FILE和@TEXT：文本文件输入输出 MODEL: SETS: MYSET / @FILE(‘myfile.txt’) / : @FILE(‘myfile.txt’); ENDSETS MIN = @SUM( MYSET( I): SHIP( I) * COST( I)); @FOR( MYSET( I): [CON1] SHIP( I) > NEED( I); [CON2] SHIP( I) < SUPPLY( I)); DATA: COST = @FILE(‘myfile.txt’); NEED = @FILE(‘myfile.txt’); SUPPLY = @FILE(‘myfile.txt’); @TEXT(‘result.txt’)=SHIP, @DUAL(SHIP), @DUAL(CON1); ENDDATA END myfile.txt文件 的内容、格式： Seattle,Detroit,Chicago,Denver~ COST,NEED,SUPPLY,SHIP~ 12,28,15,20~ 1600,1800,1200,1000~ 1700,1900,1300,1100 演示 MyfileExample.lg4