我结合网上的demo，我写了一个功能并不完整的四则运算
1 #include<stdio.h> 2 #include<math.h> 3 #include<stdlib.h> 4 #include<time.h> 5 #include<iostream> 6 using namespace std; 7 int add(); 8 int subtraction(); 9 int comop(); 10 int mul(); 11 12 int main() { 13 int x, y, m, n; 14 float s; 15 system("cls"); 16 printf("请选择语言 00：中文，01：英文"); 17 cin >> x; 18 if (x == 0) { 19 20 printf("小学四则运算 "); 21 printf("0:加法 "); 22 printf("1：减法 "); 23 printf("4:退出程序 "); 24 }else 25 { 26 printf("Primary Artithemetic Practice "); 27 printf("0:add "); 28 printf("1：减法 "); 29 printf("退出程序"); 30 } 31 32 while (1 == 1) { 33 34 scanf_s("%d", &y); 35 switch(y){ 36 case 0: 37 s = add(); 38 break; 39 case 1: 40 s =subtraction(); 41 break; 42 case 2: 43 s = mul(); 44 break; 45 case 3: 46 s = comop(); 47 break; 48 case 4: 49 exit(0); 50 break; 51 default: 52 exit(0); 53 break; 54 } 55 } 56 system("pause"); 57 } 58 int add() { 59 srand(time(NULL)); 60 int a, b,i,uanswer,ranswer; 61 int x = 0; 62 for (i = 0; i < 5; i++) { 63 a = rand() % 100; 64 b = rand() % 100; 65 ranswer = a + b; 66 printf("%d+%d=",a,b); 67 scanf_s("%d",&uanswer); 68 if (ranswer == uanswer) { 69 printf("T"); 70 x++; 71 } 72 else { 73 printf("F"); 74 75 } 76 printf("%d", x); 77 continue; 78 } 79 return 0; 80 } 81 int subtraction() { 82 srand(time(NULL)); 83 int a, b,c, i, uanswer, ranswer; 84 int x = 0; 85 for (i = 0; i < 5; i++) { 86 a = rand() % 100; 87 b = rand() % 100; 88 if (a < b) { 89 c = a; 90 a = b; 91 b = c; 92 } 93 ranswer = a - b; 94 printf("%d-%d=", a, b); 95 scanf_s("%d", &uanswer); 96 if (ranswer == uanswer) { 97 printf("T"); 98 x++; 99 } 100 else { 101 printf("F"); 102 103 } 104 printf("%d", x); 105 continue; 106 } 107 return 0; 108 } 109 110 int mul() { 111 srand(time(NULL)); 112 int a, b, i, uanswer, ranswer; 113 int x = 0; 114 for (i = 0; i < 5; i++) { 115 a = rand() % 100; 116 b = rand() % 100; 117 ranswer = a * b; 118 printf("%d*%d=", a, b); 119 scanf_s("%d", &uanswer); 120 if (ranswer == uanswer) { 121 printf("T"); 122 x++; 123 } 124 else { 125 printf("F"); 126 127 } 128 printf("%d", x); 129 continue; 130 } 131 return 0; 132 } 133 int devision() { 134 srand(time(NULL)); 135 int a, b, i, uanswer, ranswer; 136 int x = 0; 137 for (i = 0; i < 5; i++) { 138 a = rand() % 100; 139 b = rand() % 100; 140 if (b == 0) 141 { 142 b = rand() % 100; 143 } 144 ranswer = a / b; 145 printf("%d/%d=", a, b); 146 scanf_s("%d", &uanswer); 147 if (ranswer == uanswer) { 148 printf("T"); 149 x++; 150 } 151 else { 152 printf("F"); 153 154 } 155 printf("%d", x); 156 continue; 157 } 158 return 0; 159 } 160 161 int comop() { 162 srand(time(NULL)); 163 int a, b,c,m,n, i, uanswer, ranswer; 164 int x = 0; 165 for (i = 0; i < 5; i++) { 166 a = rand() % 100; 167 b = rand() % 100; 168 m = rand() % 100; 169 n = rand() % 100; 170 c = rand() % 5; 171 switch (c) { 172 case 0: 173 ranswer = (a*b) + (m*n); 174 printf("%d*%d+%d*%d=", a, b, m, n); 175 scanf_s("%d", &uanswer); 176 if (ranswer == uanswer) { 177 printf("T"); 178 x++; 179 } 180 else { 181 printf("F"); 182 183 } 184 printf("%d", x); 185 break; 186 187 case 1: 188 ranswer = (a+b)*m; 189 printf("(%d+%d)*%d=", a, b, m); 190 scanf_s("%d", &uanswer); 191 if (ranswer == uanswer) { 192 printf("T"); 193 x++; 194 } 195 else { 196 printf("F"); 197 198 } 199 printf("%d", x); 200 break; 201 } 202 203 } 204 return 0; 205 }