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ECE 103 Engineering Programming Chapter 51 Random Numbers

ECE 103 Engineering Programming Chapter 51 Random Numbers. Herbert G. Mayer, PSU CS Status 6/4/2014 Initial content copied verbatim from ECE 103 material developed by Professor Phillip Wong @ PSU ECE. Syllabus. srand() sand(). Random Number Generator

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ECE 103 Engineering Programming Chapter 51 Random Numbers

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  1. ECE 103 Engineering ProgrammingChapter 51Random Numbers Herbert G. Mayer, PSU CS Status 6/4/2014 Initial content copied verbatim from ECE 103 material developed by Professor Phillip Wong @ PSU ECE

  2. Syllabus • srand() • sand()

  3. Random Number Generator C has library functions to input and output strings. Use #include <stdio.h> In the following table, char * is a pointer to a character array that contains a string. RNG Functions 2

  4. String I/O Functions C has library functions to input and output strings. Use #include <stdio.h> In the following table, char * is a pointer to a character array that contains a string. String I/O Functions 3

  5. srand intprintf (const char * format, …) Writes formatted output to the console. Use the %s format specifier for strings. %s expects the address of a char array which contains a string. Example: char name[] = "Jane Doe"; printf("[%s]\n", name); →[Jane Doe] printf("[%s]\n", &name[0]); →[Jane Doe] printf("[%s]\n", &name[5]); →[Doe] 4

  6. rand intsprintf (char * s, constchar * format, …) Performs a formatted print and saves it to a string. Works like printf except the output is stored in string s. Nothing is printed to the console. Example: char str[50]; intx = 4; sprintf(str,"x=%d y=%f", x, 1.5f); printf("title = %s\n", str); 5

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