Java实现两个整数相除

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public class DeleTwoNum {public static void main(String[] args){int a = 7;int b = 300;int c = 5;System.out.println("a/b=" + delTwoNum(a, b, c));}/** * 得到两个整数相除的结果 * @param a 被除数 * @param b 除数 * @param c 精度，小数点位数 * @return 相除的结果 * */private static float delTwoNum(int a, int b, int c){if(b == 0){throw new RuntimeException();}if(a == 0){return 0;}int prePart = getPrePart(a, b);String aftPart = getAftPart(a, b, c);return Float.valueOf(prePart + "." + aftPart);}//获取小数部分private static String getAftPart(int a, int b, int c) {if(c == 0){return "";}while(a >= b){a = a - b;}if(a == 0){return "0";}String aft = "";int sum = 0;for(int i = 0; i < 10; i++){sum += a;}a = sum;aft = aft + getPrePart(a, b) + getAftPart(a, b, c - 1);return aft;}//获取整数部分private static int getPrePart(int a, int b) {if(a < b){return 0;}else{int count = 0;while(a >= b){a = a - b;count++;}return count;}}}

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