🔨 refactor: refactor code for pat advanced 1061 1073 1088

liuchuo · liuchuo · commit b118f247f680 · 2019-03-17T02:44:37.000+08:00
diff --git a/AdvancedLevel_C++/1061. Dating (20).cpp b/AdvancedLevel_C++/1061. Dating (20).cpp
@@ -1,37 +1,36 @@
 #include <iostream>
-#include <string>
 #include <cctype>
 using namespace std;
 int main() {
     string a, b, c, d;
     cin >> a >> b >> c >> d;
-    int min1 = min(a.length(), b.length());
-    int min2 = min(c.length(), d.length());
-    string weekday[7] = {"MON ", "TUE ", "WED ", "THU ", "FRI ", "SAT ", "SUN "};
     char t[2];
-    int pos, j;
-    for (int i = 0; i < min1; i++) {
+    int pos, i = 0, j = 0;
+    while(i < a.length() && i < b.length()) {
         if (a[i] == b[i] && (a[i] >= 'A' && a[i] <= 'G')) {
             t[0] = a[i];
-            j = i;
             break;
         }
+        i++;
     }
-    for (int i = j + 1; i < min1; i++) {
+    i = i + 1;
+    while (i < a.length() && i < b.length()) {
         if (a[i] == b[i] && ((a[i] >= 'A' && a[i] <= 'N') || isdigit(a[i]))) {
             t[1] = a[i];
             break;
         }
+        i++;
     }
-    for (int i = 0; i < min2; i++) {
-        if (c[i] == d[i] && isalpha(c[i])) {
-            pos = i;
+    while (j < c.length() && j < d.length()) {
+        if (c[j] == d[j] && isalpha(c[j])) {
+            pos = j;
             break;
         }
+        j++;
     }
-    int m = t[1] - '0';
-    if (!isdigit(t[1])) m = t[1] - 'A' + 10;
-    cout << weekday[t[0] - 'A'];
+    string week[7] = {"MON ", "TUE ", "WED ", "THU ", "FRI ", "SAT ", "SUN "};
+    int m = isdigit(t[1]) ? t[1] - '0' : t[1] - 'A' + 10;
+    cout << week[t[0]-'A'];
     printf("%02d:%02d", m, pos);
     return 0;
 }
diff --git a/AdvancedLevel_C++/1073. Scientific Notation (20).cpp b/AdvancedLevel_C++/1073. Scientific Notation (20).cpp
@@ -1,44 +1,27 @@
 #include <iostream>
-#include <string>
-#include <cctype>
 using namespace std;
 int main() {
     string s;
     cin >> s;
-    int len = s.length();
+    int i = 0;
+    while (s[i] != 'E') i++;
+    string t = s.substr(1, i-1);
+    int n = stoi(s.substr(i+1));
     if (s[0] == '-') cout << "-";
-    int pose = 0;
-    for (int i = 1; i < len; i++)
-        if (s[i] == 'E') pose = i;
-    int after = 0;
-    for (int i = pose + 2; i < len; i++)
-        after = (s[i] - '0') + 10 * after;
-    if (s[pose + 1] == '-') {
-        if (0 < after) {
-            cout << "0.";
-            for (int i = 1; i < after; i++)
-                cout << 0;
-            for (int i = 1; i < pose; i++)
-                if (isdigit(s[i])) cout << s[i];
-        } else {
-            for (int i = 1; i < pose; i++) {
-                if (i == 2 - after) cout << ".";
-                if (isdigit(s[i])) cout << s[i];
-            }
-        }
+    if (n < 0) {
+        cout << "0.";
+        for (int j = 0; j < abs(n) - 1; j++) cout << '0';
+        for (int j = 0; j < t.length(); j++)
+            if (t[j] != '.') cout << t[j];
     } else {
-        if (pose - 3 < after) {
-            if (s[1] != '0') cout << s[1];
-            for (int i = 3; i < pose; i++)
-                if (isdigit(s[i])) cout << s[i];
-            for (int i = 0; i < after - (pose - 3); i++)
-                cout << 0;
+        cout << t[0];
+        int cnt, j;
+        for (j = 2, cnt = 0; j < t.length() && cnt < n; j++, cnt++) cout << t[j];
+        if (j == t.length()) {
+            for (int k = 0; k < n - cnt; k++) cout << '0';
         } else {
-            if (s[1] != '0') cout << s[1];
-            for (int i = 3; i < pose; i++) {
-                if (i == 3 + after) cout << ".";
-                if (isdigit(s[i])) cout << s[i];
-            }
+            cout << '.';
+            for (int k = j; k < t.length(); k++) cout << t[k];
         }
     }
     return 0;
diff --git a/AdvancedLevel_C++/1088. Rational Arithmetic (20).cpp b/AdvancedLevel_C++/1088. Rational Arithmetic (20).cpp
@@ -6,51 +6,30 @@ long long gcd(long long t1, long long t2) {
     return t2 == 0 ? t1 : gcd(t2, t1 % t2);
 }
 void func(long long m, long long n) {
-    int flag1 = 0, flag2 = 0, flag = 0;
-    if (n == 0) {
-        printf("Inf");
+    if (m * n == 0) {
+        printf("%s", n == 0 ? "Inf" : "0");
         return ;
     }
-    if (m == 0) {
-        printf("0");
+    bool flag = ((m < 0 && n > 0) || (m > 0 && n < 0));
+    m = abs(m); n = abs(n);
+    long long x = m / n;
+    printf("%s", flag ? "(-" : "");
+    if (x != 0) printf("%lld", x);
+    if (m % n == 0) {
+        if(flag) printf(")");
         return ;
     }
-    if (m < 0) flag1 = 1;
-    if (n < 0) flag2 = 1;
-    m = abs(m), n = abs(n);
-    if (flag1 == 1 && flag2 == 1) flag = 0;
-    else if (flag1 == 1 || flag2 == 1) flag = 1;
-    if (m == n) {
-        if (flag == 1) printf("(-1)");
-        else printf("1");
-        return;
-    }       
-    long long x = m % n, y = m / n;
-    if (x == 0) {
-        if (flag == 0) printf("%d", y);
-        else printf("(-%d)", y);
-        return ;
-    } else {
-        long long t1 = m - y * n, t2 = n, t = gcd(t1, t2);
-        t1 = t1 / t, t2 = t2 / t;
-        if (flag == 1) {
-            printf("(-");
-            if (y != 0) printf("%lld %lld/%lld)", y, t1, t2);
-            else printf("%d/%d)", t1, t2);
-        } else {
-            if (y != 0) printf("%lld %lld/%lld", y, t1, t2);
-            else printf("%lld/%lld", t1, t2);
-        }
-    }
+    if (x != 0) printf(" ");
+    m = m - x * n;
+    long long t = gcd(m, n);
+    m = m / t; n = n / t;
+    printf("%lld/%lld%s", m, n, flag ? ")" : "");
 }
-void print() {
+int main() {
+    scanf("%lld/%lld %lld/%lld", &a, &b, &c, &d);
     func(a, b); printf(" + "); func(c, d); printf(" = "); func(a * d + b * c, b * d); printf("\n");
     func(a, b); printf(" - "); func(c, d); printf(" = "); func(a * d - b * c, b * d); printf("\n");
     func(a, b); printf(" * "); func(c, d); printf(" = "); func(a * c, b * d); printf("\n");
-    func(a, b); printf(" / "); func(c, d); printf(" = "); func(a * d, b * c); printf("\n");
-}
-int main() {
-    scanf("%lld/%lld %lld/%lld", &a, &b, &c, &d);
-    print();
+    func(a, b); printf(" / "); func(c, d); printf(" = "); func(a * d, b * c);
     return 0;
 }
diff --git a/BasicLevel_C++/1034. 有理数四则运算(20).cpp b/BasicLevel_C++/1034. 有理数四则运算(20).cpp
@@ -6,51 +6,30 @@ long long gcd(long long t1, long long t2) {
     return t2 == 0 ? t1 : gcd(t2, t1 % t2);
 }
 void func(long long m, long long n) {
-    int flag1 = 0, flag2 = 0, flag = 0;
-    if (n == 0) {
-        printf("Inf");
+    if (m * n == 0) {
+        printf("%s", n == 0 ? "Inf" : "0");
         return ;
     }
-    if (m == 0) {
-        printf("0");
+    bool flag = ((m < 0 && n > 0) || (m > 0 && n < 0));
+    m = abs(m); n = abs(n);
+    long long x = m / n;
+    printf("%s", flag ? "(-" : "");
+    if (x != 0) printf("%lld", x);
+    if (m % n == 0) {
+        if(flag) printf(")");
         return ;
     }
-    if (m < 0) flag1 = 1;
-    if (n < 0) flag2 = 1;
-    m = abs(m), n = abs(n);
-    if (flag1 == 1 && flag2 == 1) flag = 0;
-    else if (flag1 == 1 || flag2 == 1) flag = 1;
-    if (m == n) {
-        if (flag == 1) printf("(-1)");
-        else printf("1");
-        return;
-    }       
-    long long x = m % n, y = m / n;
-    if (x == 0) {
-        if (flag == 0) printf("%d", y);
-        else printf("(-%d)", y);
-        return ;
-    } else {
-        long long t1 = m - y * n, t2 = n, t = gcd(t1, t2);
-        t1 = t1 / t, t2 = t2 / t;
-        if (flag == 1) {
-            printf("(-");
-            if (y != 0) printf("%lld %lld/%lld)", y, t1, t2);
-            else printf("%d/%d)", t1, t2);
-        } else {
-            if (y != 0) printf("%lld %lld/%lld", y, t1, t2);
-            else printf("%lld/%lld", t1, t2);
-        }
-    }
+    if (x != 0) printf(" ");
+    m = m - x * n;
+    long long t = gcd(m, n);
+    m = m / t; n = n / t;
+    printf("%lld/%lld%s", m, n, flag ? ")" : "");
 }
-void print() {
+int main() {
+    scanf("%lld/%lld %lld/%lld", &a, &b, &c, &d);
     func(a, b); printf(" + "); func(c, d); printf(" = "); func(a * d + b * c, b * d); printf("\n");
     func(a, b); printf(" - "); func(c, d); printf(" = "); func(a * d - b * c, b * d); printf("\n");
     func(a, b); printf(" * "); func(c, d); printf(" = "); func(a * c, b * d); printf("\n");
-    func(a, b); printf(" / "); func(c, d); printf(" = "); func(a * d, b * c); printf("\n");
-}
-int main() {
-    scanf("%lld/%lld %lld/%lld", &a, &b, &c, &d);
-    print();
+    func(a, b); printf(" / "); func(c, d); printf(" = "); func(a * d, b * c);
     return 0;
 }
