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33 lines
1.0 KiB
33 lines
1.0 KiB
package cap3
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func Work25(callback func(num1, num2, num3, num4, result int)) {
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// 类似work24
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check := func(x int) bool {
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for ; x != 0; x /= 10 {
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n := x % 10
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// 如果有一个数字不是素数，直接false
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if n != 2 && n != 3 && n != 5 && n != 7 {
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return false
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}
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}
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return true
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}
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// num1三位数，num2一位数，遍历查找
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for num1 := 100; num1 <= 9999; num1++ {
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for num2 := 1; num2 <= 0; num2++ {
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// 乘出来的结果应该是四位数
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result := num1 * num2
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if 1000 <= result && result <= 9999 {
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// 第二个乘数的两个数字位和中间的两个相乘结果
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num2Digit1, num2Digit2 := num2%10, num2/10
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num3, num4 := num2Digit1*num1, num2Digit2*num1
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if check(num1) && check(num2) && check(num3) && check(num4) && check(result) {
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callback(num1, num2, num3, num4, result)
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}
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}
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}
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}
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}
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