Random number generation in the C language is implemented using pseudo-random number algorithms. Pseudo-random number algorithms are deterministic algorithms that generate a series of seemingly random numerical sequences based on an initial seed value.<\/p>\n
In C language, the function for generating random numbers is rand(), which generates a pseudo-random number based on the current seed value and updates the seed value to the next value. The range of values generated by the rand() function is between 0 and RAND_MAX, which is a macro definition representing the maximum value for generating random numbers.<\/p>\n
The rand() function operates using the algorithm based on the linear congruential generator. It calculates the next random number using a linear equation, with the specific formula being:<\/p>\n
The next value is equal to the product of the previous value and a plus c, all divided by m.<\/p>\n
Among them, previous is the current seed value, next is the generated random number, and a, c, and m are fixed constants. The selection of these constants is very important for the quality and distribution of the generated random number sequence.<\/p>\n
In a program, it is usually necessary to set a seed value first by using the srand() function to pass a specific value as the seed value to the rand() function. If the seed value is not set manually, the rand() function will use a default seed value. To obtain a higher quality of random number series, you can use the current time as the seed value, for example:<\/p>\n
Generate a random seed based on the current time.<\/p>\n
This ensures that each time the program is run, the seed value will be different, thereby generating a different sequence of random numbers.<\/p>\n","protected":false},"excerpt":{"rendered":"
Random number generation in the C language is implemented using pseudo-random number algorithms. Pseudo-random number algorithms are deterministic algorithms that generate a series of seemingly random numerical sequences based on an initial seed value. In C language, the function for generating random numbers is rand(), which generates a pseudo-random number based on the current seed […]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[15487,381,7143,5033,7134],"class_list":["post-14297","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-c-library","tag-c-programming","tag-pseudo-random","tag-rand-function","tag-random-numbers"],"yoast_head":"\n