#include<stdio.h>#include<math.h>#include<stdlib.h>#include<time.h>int moshi;int count;void plus(int first,int second){int result;printf("%d + %d =",first,second);scanf("%d",&result);if(result == first+second){printf("Right!\n");}else{printf("wrong!\nThe correct answer is:%d\n",first+second);}}void minus(int first,int second){int result;printf("%d - %d =",first,second);scanf("%d",&result);if(result == first-second){printf("Right!\n");}else{printf("wrong!\nThe correct answer is:%d\n",first+second);}}void multiply(int first,int second){int result; //运算结果printf("%d * %d =",first,second);scanf("%d",&result);if(result == first*second){printf("Right!\n");}else{printf("wrong!\nThe correct answer is:%d\n",first*second);}}void divide(int first,int second){float result; //运算结果float temp;second = rand()0;printf("%d / %d =",first,second);if(second==0){printf("Error!\n");return;}scanf("%f",&result);temp=result*100 - ((float)first/(float)second)*100;if(abs(temp)<0.01){printf("Right!\n");}else{printf("wrong!\nThe correct answer is:%f\n",(float)first/(float)second);}}int main(){printf("小提示:\n每种模式默认运行5次就得重新选择,中途退出直接按Ctrl+c!\n");p: printf("请选择模式:\n\n");printf("----------1:练习模式\n");printf("----------2:计算模式\n");count=0;scanf("%d",&moshi);switch(moshi){case 1:{ int n;int first,second;//保存两个运算的数字while(true){n=first%4; //除以4取余数，随机确定调用函数srand(time(NULL));first = rand()0;second = rand()0;if(count==5)goto p;switch(n){case 0:{plus(first,second);count++;break;}case 1:{minus(first,second);count++;break;}case 2:{multiply(first,second);count++;break;}case 3:{divide(first,second);count++;break;}default:{count++;break;}}//switch}//while}//case1case 2:{int first,second;char c,c1; //保存运算符while(true){scanf("%d%c%d%c",&first,&c,&second,&c1);if(count==5)goto p;switch(c){case '+':{printf("%d+%d=%d\n",first,second,first+second);count++;break;}case '-':{printf("%d-%d=%d\n",first,second,first-second);count++;break;}case '*':{printf("%d*%d=%d\n",first,second,first*second);count++;break;}case '/':{printf("%d/%d=%f\n",first,second,(float)first/(float)second);count++;break;}default:{count++;break;}}//switch}//while}//case2default:{break;}}return 0;}
#include<stdio.h>#include<math.h>#include<stdlib.h>#include<time.h>int moshi;int count;void plus(int first,int second){int result;printf("%d + %d =",first,second);scanf("%d",&result);if(result == first+second){printf("Right!\n");}else{printf("wrong!\nThe correct answer is:%d\n",first+second);}}void minus(int first,int second){int result;printf("%d - %d =",first,second);scanf("%d",&result);if(result == first-second){printf("Right!\n");}else{printf("wrong!\nThe correct answer is:%d\n",first+second);}}void multiply(int first,int second){int result; //运算结果printf("%d * %d =",first,second);scanf("%d",&result);if(result == first*second){printf("Right!\n");}else{printf("wrong!\nThe correct answer is:%d\n",first*second);}}void divide(int first,int second){float result; //运算结果float temp;second = rand()0;printf("%d / %d =",first,second);if(second==0){printf("Error!\n");return;}scanf("%f",&result);temp=result*100 - ((float)first/(float)second)*100;if(abs(temp)<0.01){printf("Right!\n");}else{printf("wrong!\nThe correct answer is:%f\n",(float)first/(float)second);}}int main(){printf("小提示:\n每种模式默认运行5次就得重新选择,中途退出直接按Ctrl+c!\n");p: printf("请选择模式:\n\n");printf("----------1:练习模式\n");printf("----------2:计算模式\n");count=0;scanf("%d",&moshi);switch(moshi){case 1:{ int n;int first,second;//保存两个运算的数字while(true){n=first%4; //除以4取余数，随机确定调用函数srand(time(NULL));first = rand()0;second = rand()0;if(count==5)goto p;switch(n){case 0:{plus(first,second);count++;break;}case 1:{minus(first,second);count++;break;}case 2:{multiply(first,second);count++;break;}case 3:{divide(first,second);count++;break;}default:{count++;break;}}//switch}//while}//case1case 2:{int first,second;char c,c1; //保存运算符while(true){scanf("%d%c%d%c",&first,&c,&second,&c1);if(count==5)goto p;switch(c){case '+':{printf("%d+%d=%d\n",first,second,first+second);count++;break;}case '-':{printf("%d-%d=%d\n",first,second,first-second);count++;break;}case '*':{printf("%d*%d=%d\n",first,second,first*second);count++;break;}case '/':{printf("%d/%d=%f\n",first,second,(float)first/(float)second);count++;break;}default:{count++;break;}}//switch}//while}//case2default:{break;}}return 0;}
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