题目链接:点击
题目理解:
1.K N1 aN1 N2 aN2 ... NK aNK, k代表的是多项式的项数, NK是多项式的指数, aNK 是多项式的的系数
其中1<=K<=10, k∈N+, 0 <= NK < ... < N2 < N1 <=1000 (注意这里的递减关系)
2.两个多项式相加,要按照以下的格式输入输出
3.输出的系数部分保留一位小数
例:
输入:
2 1 2.4 0 3.2 2 2 1.5 1 0.5
输出:
3 2 1.5 1 2.9 0 3.2
注意点:
1.输出格式
2.不要输出相加系数为零的项,完全抵消的话,输出0;
3.注意数组越界问题(我因为数组范围太小, 第二个测试点一直无法通过,但是报的是答案错误而不是段错误,导致我看了好久的程序,
后来输入允许的最多项后, vs2008 报出stack around the variable “” was corrupted的错误。具体的问题详解请百度,扩大数组范围后,问题解决)
源代码如下(附两种方法,注释部分方法代码来源于https://www.cnblogs.com/brucekun/p/6511922.html):
1 #include2 void getData(double *arr) 3 { 4 double count=0; 5 int i=1; 6 scanf("%lf", &count); 7 8 arr[0] = count; 9 count = count*2; 10 while(count>0) 11 { 12 scanf(" %lf", &arr[i]); 13 i++; 14 count--; 15 } 16 return; 17 } 18 int main() 19 { 20 double a[21] = {0}; 21 double b[21] = {0}; 22 double c[42] = {0}; 23 int i=1, k=1; 24 int tmp2; 25 char d; 26 getData(a); 27 scanf("%c", &d); //用来吸收多余的换行 28 getData(b); 29 tmp2 = 1; 30 for(i = 1, k = 1; i<=a[0]*2 && k<=b[0]*2;) { 31 if (a[i]<b[k]) { 32 c[tmp2] = b[k]; 33 c[tmp2+1] = b[k+1]; 34 k = k+2; 35 tmp2 = tmp2+2; 36 } else if (a[i]>b[k]) { 37 c[tmp2] = a[i]; 38 c[tmp2+1] = a[i+1]; 39 tmp2 = tmp2+2; 40 i = i+2; 41 } else { 42 if((a[i+1]+b[k+1])!=0) { 43 c[tmp2] = a[i]; 44 c[tmp2+1] = a[i+1]+b[k+1]; 45 tmp2 = tmp2+2; 46 } 47 48 i = i+2; 49 k = k+2; 50 } 51 } 52 while(i<=a[0]*2) { 53 c[tmp2] = a[i]; 54 c[tmp2+1] = a[i+1]; 55 tmp2 = tmp2+2; 56 i = i+2; 57 } 58 59 while(k<=b[0]*2) { 60 c[tmp2] = b[k]; 61 c[tmp2+1] = b[k+1]; 62 k = k+2; 63 tmp2 = tmp2+2; 64 } 65 tmp2 = tmp2-1; //减去最后多加的一个 66 c[0] = tmp2/2; 67 printf("%.0lf", c[0]); 68 for(i=1; i<=tmp2; i++) { 69 if((i%2) != 0) { 70 printf(" %.0lf", c[i]); 71 } else { 72 printf(" %.1lf", c[i]); 73 } 74 } 75 return 0; 76 } 77 78 /* 79 #include 80 81 struct node 82 { 83 int exp; 84 double coef; 85 }a[11], b[11]; 86 int main() 87 { 88 double c[1001]={0}; 89 int sum = 0; 90 int m = 0; 91 int n = 0; 92 int i = 0; 93 int k = 0; 94 scanf("%d ", &m); 95 sum = m; 96 for(i=0; i 97 scanf("%d %lf", &a[i].exp, &a[i].coef); 98 c[a[i].exp] = a[i].coef; 99 } 100 101 scanf(" %d ", &n); 102 sum += n; 103 for(i=0; i 104 scanf("%d %lf", &b[i].exp, &b[i].coef); 105 c[b[i].exp] += b[i].coef; 106 } 107 108 for(i=0; i 109 for(int k=0; k 110 if(a[i].exp==b[k].exp) { 111 sum--; 112 if((a[i].coef+b[k].coef)==0) 113 sum --; 114 } 115 } 116 } 117 118 printf("%d", sum); 119 for(int i=1000; i>=0; i--) { 120 if(c[i] != 0) { 121 printf(" %d %.1lf",i, c[i]); 122 } 123 } 124 return 0; 125 }*/