四则运算姓名：学号：班级：1.功能结构图2.程序功能进行整数的加减乘除和求模运算。
程序采用随机产生1~100的两个数进行运算每种运算有10个题目用户输入对应的答案程序提示答案的对错最后统计正确率。
每次给出两次答题机会。
3.程序流程图4.函数列表及功能5.源程序代码#include<stdio.h>#include<stdlib.h>#include<time.h>#define N 10int f(int a,int b){ //自定义函数int result;result=a+b;return result;}int f1(int a,int b){int result;result=a-b;return result;}int f2(int a,int b){int result;result=a*b;return result;}int f3(int a,int b){int result;result=a*b/b;return result;}int mod(int a,int b){int result;result=a%b;return result;}int main(){int a,b,res,ans;int i,count;int op,c;srand((unsigned)time(NULL)); while(1){printf("\n---加减乘除运算练习系统---\n");printf("1.加法运算\n");printf("2.减法运算\n");printf("3.乘法运算\n");printf("4.除法运算\n");printf("5.求模运算\n");printf("6.混合运算\n");printf("0.退出练习\n");printf(" 请输入数字0~6:");scanf("%d",&op); //输入相应数字进行练习switch(op){case 1:printf("--请进行加法运算--\n");count=0;for(i=1;i<=N;i++){a=rand()%100+1;b=rand()%100+1;res=f(a,b); //调用加法函数printf("%d+%d=",a,b);scanf("%d",&ans); //输入数值if(ans==res){printf("Very Good!\n");count++;}else{printf("wrong! 请重新输入\n");scanf("%d",&ans);if(ans==res)printf("Very Good!\n");elseprintf("Wrong Answer!\n");}}printf("***正确率为%.0f%%***\n",100.0*count/N); break;case 2:printf("--请进行减法运算--\n");count=0;for(i=1;i<=N;i++){a=rand()%100+1;b=rand()%100+1;res=f1(a,b); //调用减法函数printf("%d-%d=",a,b);scanf("%d",&ans); //输入数值if(ans==res){printf("Very Good!\n");count++;}else{printf("wrong! 请重新输入\n");scanf("%d",&ans);if(ans==res)printf("Very Good!\n");elseprintf("Wrong Answer!\n");}}printf("***正确率为%.0f%%***\n",100.0*count/N); break;case 3:printf("--请进行乘法运算--\n");count=0;for(i=1;i<=N;i++){a=rand()%100+1;b=rand()%100+1;res=f2(a,b); //调用乘法函数printf("%d*%d=",a,b);scanf("%d",&ans); //输入数值if(ans==res){printf("Very Good!\n");count++;}else{printf("wrong! 请重新输入\n");scanf("%d",&ans);if(ans==res)printf("Very Good!\n");elseprintf("Wrong Answer!\n");}}printf("***正确率为%.0f%%***\n",100.0*count/N); break;case 4:printf("--请进行除法运算--\n");count=0;for(i=1;i<=N;i++){a=rand()%10+1;b=rand()%10+1;res=f3(a,b); //调用除法函数printf("%d/%d=",a*b,b);scanf("%d",&ans); //输入数值if(ans==res){printf("Very Good!\n");count++;}else{printf("wrong! 请重新输入\n");scanf("%d",&ans);if(ans==res)printf("Very Good!\n");elseprintf("Wrong Answer!\n");}}printf("***正确率为%.0f%%***\n",100.0*count/N); break;case 6:printf("--请进行混合运算--\n");count=0;for(i=1;i<=N;i++){a=rand()%100+1;b=rand()%100+1;c=rand()%5; //产生0~4的随机数{switch(c) //随机出现进行混合运算{case 0:printf("%d+%d=",a,b);res=f(a,b);break;case 1:printf("%d-%d=",a,b);res=f1(a,b);break;case 2:printf("%d*%d=",a,b);res=f2(a,b);break;case 3:a=a%10+1;b=b%10+1;printf("%d/%d=",a*b,b);res=f3(a,b);break;case 4:printf("%d%%%d=",a,b);res=mod(a,b);break;}}scanf("%d",&ans); //输入数值if(ans==res){printf("Very Good!\n");count++;}else{printf("wrong! 请重新输入\n");scanf("%d",&ans);if(ans==res)printf("Very Good!\n");elseprintf("Wrong Answer!\n");}}printf("***正确率为%.0f%%***\n",100.0*count/N); break;case 5:printf("--请进行求模运算--\n");count=0;for(i=1;i<=N;i++){a=rand()%100+1;b=rand()%100+1;res=mod(a,b); //调用求模函数printf("%d%%%d=",a,b);scanf("%d",&ans); //输入数值if(ans==res){printf("Very Good!\n");count++;}else{printf("wrong! 请重新输入\n");scanf("%d",&ans);if(ans==res)printf("Very Good!\n");elseprintf("Wrong Answer!\n");}}printf("***正确率为%.0f%%***\n",100.0*count/N); break;case 0:goto END; //转到结束}}END:printf("---练习结束---\n");return 0;}6程序运行图选取起始和加法混合运算程序开始显示6种练习方式输入0为退出。
加法运算练习结束后输出正确率。