本文实例展示了C语言循环结构与时间函数用法，对于C语言的学习来说是非常不错的参考借鉴材料。分享给大家供大家参考之用。具体如下：

完整实例代码如下：

/************************************************ 《Beginning C 4th Edition》 Notes codes** Created by Goopand** Compiler: gcc 4.7.0***********************************************/#include <stdio.h> #include <ctype.h> #include <stdbool.h> #include <time.h> #include <stdlib.h> int main(void){ char nextGame = 'Y'; bool correct = false; int counter = 0; int seq_len = 0; int input_num = 0; time_t seed = 0; //int i = 0; clock_t start_clock = 0; int time_taken = 0; printf("Here is a simon game for training memory ability .\n"); printf("\nThe screen will show a number sequence for 1 second , "); printf("then the sequence will disappear. You are suggested to " "input the same sequence to pass the game.\n"); printf("\nNotice this: each digit is seperated by a space. \n"); printf("\nNow press Enter to play .. Good luck !\n"); scanf("%c",&nextGame); //Waiting for user's input do { correct = true ; counter = 0 ; seq_len = 2 ; time_taken = clock(); while(correct) { seq_len += (counter++ % 3 == 0); //if "==" expression is true,returns 1; else returns 0 seed = time(NULL); srand((unsigned int)seed); //initialize the seed for rand() function for(int i=0; i<seq_len; i++) printf("%d ",rand() % 10); //Output a random digit and a space start_clock = clock() ; //returns start clock time,clock() is a timer for(;clock() - start_clock < CLOCKS_PER_SEC;) ; //CLOCKS_PER_SEC is a const defined in time.h printf("\r"); //control char "\r" : locator back to beginning of the line for(int i=0; i<seq_len; i++) printf(" "); //two spaces to overwrite the sequence printf("\r"); srand((unsigned int)seed); //Restart the random sequence for(int i=0; i<seq_len; i++) { scanf("%d",&input_num); //Read an input number if(input_num != rand() % 10 ) { correct = false ; break; } } printf("%s\n",correct ? "Correct !" : "Wrong !"); } time_taken=(clock() - time_taken) / CLOCKS_PER_SEC ; printf("\n\nYour score is %d", --counter * 100 / time_taken); fflush(stdin); //Empty the input buffer printf("\nDo you want to play again (y/n)? "); scanf("%c",&nextGame); } while(tolower(nextGame) == 'y'); return 0;}

本文实例源自国外网站，为一个数字游戏，感兴趣的读者可以调试运行一下，体会代码的原理，加深对C语言循环结构域时间函数的认识。