linux - Bash 脚本多字符串变量比较

Question

我想比较 3 组然后我写了一个 bash 脚本但结果是错误的。 请指导我

#!/bin/bash
function SCORETYPE {
if [[ "$ENG1" < "$ENG2" || "$ENG3" < "$ENG4" || "$ENG5" > "$ENG6" ]]; then
    STYPE="A"
elif [[ "$ENG1" < "$ENG2" || "$ENG3" > "$ENG4" || "$ENG5" > "$ENG6" ]]; then
    STYPE="B"
elif [[ "$ENG1" > "$ENG2" || "$ENG3" < "$ENG4" || "$ENG5" < "$ENG6" ]]; then
    STYPE="C"
else
    STYPE="D"
fi

echo "$STYPE"
}

# DATA for  A
ENG1=10; ENG2=15; ENG3=5; ENG4=7; ENG5=45; ENG6=15
echo -n "Correct is A -- Answer is = "; SCORETYPE

# DATA for  B
ENG1=3; ENG2=10; ENG3=8; ENG4=7; ENG5=40; ENG6=38
echo -n "Correct is B -- Answer is = "; SCORETYPE

# DATA for  C
ENG1=12; ENG2=9; ENG3=6; ENG4=9; ENG5=32; ENG6=50
echo -n "Correct is C -- Answer is = "; SCORETYPE

# DATA for  D
ENG1=12; ENG2=9; ENG3=9; ENG4=8; ENG5=32; ENG6=50
echo -n "Correct is D -- Answer is = "; SCORETYPE

脚本结果

root@proxy:/tmp# vi multiple_var_test && ./multiple_var_test

正确的是 A -- 答案是 = A

正确的是 B -- 答案是 = A

正确的是 C -- 答案是 = A

正确的是 D -- 答案是 = A

Answer 1

使用 (( 而不是 [[ 来计算算术表达式。

您还需要在您的条件中使用&&(和)，而不是||(或)。

试试这个:

function SCORETYPE {
if (( ENG1 < ENG2 && ENG3 < ENG4 && ENG5 > ENG6 )); then
    STYPE="A"
elif (( ENG1 < ENG2 && ENG3 > ENG4 && ENG5 > ENG6 )); then
    STYPE="B"
elif (( ENG1 > ENG2 && ENG3 < ENG4 && ENG5 < ENG6 )); then
    STYPE="C"
else
    STYPE="D"
fi

echo "$STYPE"
}

(注意:在算术表达式中，变量没有必要加上前缀$。)