i The C Programming language Chapter 5 Control Flow if expr1) statement l else if(expr2) statement2 else if(expr3) Statement as: if(salary> 1000) dex=0. 4 else if(salary>800) index=0.3 else if(salary> 600 index=0.2 else if(salary>400 index=0.1 else index=0 非0 statemnt1 statemnt2 statemnt3 statemntnThe C Programming Language Chapter 5 Control Flow ▪ if ( expr1 ) statement1 else if (expr2 ) statement2 else if (expr3 ) statement3 …... [ else statement n ] expr1 statemnt1 非0 =0 expr2 expr3 statemnt2 statemnt3 statemntn 非0 非0 =0 =0 ▪ flowchart： as： if (salary>1000) index=0.4; else if (salary>800) index=0.3; else if (salary>600) index=0.2; else if (salary>400) index=0.1; else index=0;