c++四则运算

#include<iostream> #include<time.h> using namespace std; void additiveTest(int a) { int m,n,k=0,Qian,Hou; srand(time(0)); for(n=1;n<=a;n++){ cout<<(Qian=rand()%100)<<"+"<<(Hou=rand()%100)<<"="; cin>>m; if(Qian+Hou==m){ cout<<"正确!"<<endl; k=k+1; } else{ cout<<"错误!"<<endl; } } cout<<"答题正确数量为:"<<k<<endl; k=((100/a)*k); cout<<"答题正确分数为:"<<k<<"分"<<endl; } void subtractionTest(int a){ int m,n,zk=0,Qian,Hou; srand(time(0)); for(n=1;n<=a;n++){ cout<<(Qian=rand()%100)<<"-"<<(Hou=rand()%100)<<"="; cin>>m; if(Qian-Hou==m){ cout<<"正确!"<<endl; zk=zk+1; } else{ cout<<"错误!"<<endl; } } cout<<"答题正确数量为:"<<zk<<endl; zk=((100/a)*zk); cout<<"答题正确分数为:"<<zk<<"分"<<endl; } void multiplicationTest(int a){ int m,n,k=0,Qian,Hou; srand(time(0)); for(n=1;n<=a;n++){ cout<<(Qian=rand()%10)<<"*"<<(Hou=rand()%10)<<"="; cin>>m; if(Qian*Hou==m){ cout<<"正确!"<<endl; k=k+1; } else{ cout<<"错误!"<<endl; } } cout<<"答题正确数量为:"<<k<<endl; k=((100/a)*k); cout<<"答题正确分数为:"<<k<<"分"<<endl; } void divisionTest(int a){ int m,n,k=0,Qian,Hou; srand(time(0)); for(n=1;n<=a;n++){ cout<<(Qian=rand()%100)<<"/"<<(Hou=rand()%10)<<"="; cin>>m; if(Qian/Hou==m){ cout<<"正确!"<<endl; k=k+1; } else{ cout<<"错误!"<<endl; } } cout<<"答题正确数量为:"<<k<<endl; k=((100/a)*k); cout<<"答题正确分数为:"<<k<<"分"<<endl; } void mixedTest(int a){ int m,n,k=0,Qian,Hou; srand(time(0)); for(n=1;n<=a;n++){ if(n%4==0){ cout<<(Qian=rand()%100)<<"/"<<(Hou=rand()%10)<<"="; cin>>m; if(Qian/Hou==m){ cout<<"正确!"<<endl; k=k+1; } else{ cout<<"错误!"<<endl; } } if(n%4==1){ cout<<(Qian=rand()%10)<<"*"<<(Hou=rand()%10)<<"="; cin>>m; if(Qian*Hou==m){ cout<<"正确!"<<endl; k=k+1; } else{ cout<<"错误!"<<endl; } } if(n%4==2){ cout<<(Qian=rand()%100)<<"+"<<(Hou=rand()%100)<<"="; cin>>m; if(Qian+Hou==m){ cout<<"正确!"<<endl; k=k+1; } else{ cout<<"错误!"<<endl; } } if(n%4==3){ cout<<(Qian=rand()%100)<<"-"<<(Hou=rand()%100)<<"="; cin>>m; if(Qian-Hou==m){ cout<<"正确!"<<endl; k=k+1; } else{ cout<<"错误!"<<endl; } } } cout<<"答题正确数量为:"<<k<<endl; k=((100/a)*k); cout<<"答题正确分数为:"<<k<<"分"<<endl; } void showMenu(int a) { int b; if(a==1){ cout<<"现在开始两位数以内加法测试!"<<endl; cout<<"请输入需要测试的题数:"<<endl; cin>>b; additiveTest(b); } if(a==2){ cout<<"现在开始两位数以内减法测试!"<<endl; cout<<"请输入需要测试的题数:"<<endl; cin>>b; subtractionTest(b); } if(a==3){ cout<<"现在开始两位数以内乘法测试!"<<endl; cout<<"请输入需要测试的题数:"<<endl; cin>>b; multiplicationTest(b); } if(a==4){ cout<<"现在开始两位数以内除法测试!"<<endl; cout<<"请输入需要测试的题数:"<<endl; cin>>b; divisionTest(b); } if(a==5){ cout<<"现在开始两位数以内加、减、乘、除法测试!"<<endl; cout<<"请输入需要测试的题数:"<<endl; cin>>b; mixedTest(b); } if(a==6){ cout<<"现在已经退出!"<<endl; } } int main() { int x; while(x!=6){ cout<<"1、两位数以内加法测试!"<<endl; cout<<"2、两位数以内减法测试!"<<endl; cout<<"3、两位数以内乘法测试!"<<endl; cout<<"4、两位数以内除法测试!"<<endl; cout<<"5、两位数以内加、减、乘、除法测试!"<<endl; cout<<"6、退出!"<<endl; cout<<"请输入相应的测试对应的数字!"<<endl; cin>>x; showMenu(x); } }