algo1-4.cpp 说明exit()函数作用的程序

本文通过一个简单的C++程序示例介绍了如何使用exit()函数来终止程序运行。当程序中某个条件满足时,可以通过调用exit()函数并传递一个状态码来立即结束程序执行。该示例程序接收用户输入,并根据特定条件决定是否调用exit()函数。

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  1. // algo1-4.cpp 说明exit()函数作用的程序
  2.  #include"c1.h"
  3.  int a(int i)
  4.  {
  5.    if(i==1)
  6.    { 
  7.      printf("退出程序的运行/n");
  8.      exit(1);
  9.    }
  10.    return i;
  11.  }
  12.  void main()
  13.  {
  14.    int i;
  15.    printf("请输入i:");
  16.    scanf("%d",&i);
  17.    printf("a(i)=%d/n",a(i));
  18.  }
 
C:\Users\hdhfg\AppData\Local\Temp\.arduinoIDE-unsaved2025528-21424-mrpq9p.55lhp\sketch_jun28b\sketch_jun28b.ino: In function 'void setup()': C:\Users\hdhfg\AppData\Local\Temp\.arduinoIDE-unsaved2025528-21424-mrpq9p.55lhp\sketch_jun28b\sketch_jun28b.ino:16:34: error: no matching function for call to 'arduino::esp32::spi::slave::Slave::begin(spi_host_device_t, const int&)' slave.begin(SPI2_HOST, CS_PIN); // 使用HSPI ^ In file included from C:\Users\hdhfg\AppData\Local\Temp\.arduinoIDE-unsaved2025528-21424-mrpq9p.55lhp\sketch_jun28b\sketch_jun28b.ino:2: d:\Arduino IDE\libraries\libraries\ESP32SPISlave/ESP32SPISlave.h:233:10: note: candidate: 'bool arduino::esp32::spi::slave::Slave::begin(uint8_t)' bool begin(const uint8_t spi_bus = HSPI) ^~~~~ d:\Arduino IDE\libraries\libraries\ESP32SPISlave/ESP32SPISlave.h:233:10: note: candidate expects 1 argument, 2 provided d:\Arduino IDE\libraries\libraries\ESP32SPISlave/ESP32SPISlave.h:250:10: note: candidate: 'bool arduino::esp32::spi::slave::Slave::begin(uint8_t, int, int, int, int)' bool begin(uint8_t spi_bus, int sck, int miso, int mosi, int ss) ^~~~~ d:\Arduino IDE\libraries\libraries\ESP32SPISlave/ESP32SPISlave.h:250:10: note: candidate expects 5 arguments, 2 provided d:\Arduino IDE\libraries\libraries\ESP32SPISlave/ESP32SPISlave.h:266:10: note: candidate: 'bool arduino::esp32::spi::slave::Slave::begin(uint8_t, int, int, int, int, int, int)' bool begin(uint8_t spi_bus, int sck, int ss, int data0, int data1, int data2, int data3) ^~~~~ d:\Arduino IDE\libraries\libraries\ESP32SPISlave/ESP32SPISlave.h:266:10: note: candidate expects 7 arguments, 2 provided d:\Arduino IDE\libraries\libraries\ESP32SPISlave/ESP32SPISlave.h:288:10: note: candidate: 'bool arduino::esp32::spi::slave::Slave::begin(uint8_t, int, int, int, int, int, int, int, int, int, int)' bool begin(uint8_t spi_bus, int sck, int ss, int data0, int data1, int data2, int data3, int data4, int data5, int data6, int data7) ^~~~~ d:\Arduino IDE\libraries\libraries\ESP32SPISlave/ESP32SPISlave.h:288:10: note: candidate expects 11 arguments, 2 provided C:\Users\hdhfg\AppData\Local\Temp\.arduinoIDE-unsaved2025528-21424-mrpq9p.55lhp\sketch_jun28b\sketch_jun28b.ino: In function 'void loop()': C:\Users\hdhfg\AppData\Local\Temp\.arduinoIDE-unsaved2025528-21424-mrpq9p.55lhp\sketch_jun28b\sketch_jun28b.ino:24:15: error: 'using ESP32SPISlave = class arduino::esp32::spi::slave::Slave' {aka 'class arduino::esp32::spi::slave::Slave'} has no member named 'available' if (slave.available()) { ^~~~~~~~~ C:\Users\hdhfg\AppData\Local\Temp\.arduinoIDE-unsaved2025528-21424-mrpq9p.55lhp\sketch_jun28b\sketch_jun28b.ino:25:66: error: no matching function for call to 'arduino::esp32::spi::slave::Slave::wait(uint8_t [261], const uint32_t&)' size_t received_size = slave.wait(spi_buffer, BUFFER_SIZE); ^ In file included from C:\Users\hdhfg\AppData\Local\Temp\.arduinoIDE-unsaved2025528-21424-mrpq9p.55lhp\sketch_jun28b\sketch_jun28b.ino:2: d:\Arduino IDE\libraries\libraries\ESP32SPISlave/ESP32SPISlave.h:399:25: note: candidate: 'std::vector<unsigned int> arduino::esp32::spi::slave::Slave::wait(uint32_t)' std::vector<size_t> wait(uint32_t timeout_ms = 0) ^~~~ d:\Arduino IDE\libraries\libraries\ESP32SPISlave/ESP32SPISlave.h:399:25: note: candidate expects 1 argument, 2 provided C:\Users\hdhfg\AppData\Local\Temp\.arduinoIDE-unsaved2025528-21424-mrpq9p.55lhp\sketch_jun28b\sketch_jun28b.ino:58:47: error: no matching function for call to 'min(int, uint16_t&)' int display_count = min(10, block_size); ^ In file included from c:\users\hdhfg\appdata\local\arduino15\packages\esp32\tools\xtensa-esp32-elf-gcc\esp-2021r2-patch5-8.4.0\xtensa-esp32-elf\include\c++\8.4.0\algorithm:62, from C:\Users\hdhfg\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.11\cores\esp32/Arduino.h:172, from C:\Users\hdhfg\AppData\Local\Temp\arduino\sketches\9775FC6C6AD6729580772478E700C403\sketch\sketch_jun28b.ino.cpp:1: c:\users\hdhfg\appdata\local\arduino15\packages\esp32\tools\xtensa-esp32-elf-gcc\esp-2021r2-patch5-8.4.0\xtensa-esp32-elf\include\c++\8.4.0\bits\stl_algo.h:3456:5: note: candidate: 'template<class _Tp, class _Compare> _Tp std::min(std::initializer_list<_Tp>, _Compare)' min(initializer_list<_Tp> __l, _Compare __comp) ^~~ c:\users\hdhfg\appdata\local\arduino15\packages\esp32\tools\xtensa-esp32-elf-gcc\esp-2021r2-patch5-8.4.0\xtensa-esp32-elf\include\c++\8.4.0\bits\stl_algo.h:3456:5: note: template argument deduction/substitution failed: C:\Users\hdhfg\AppData\Local\Temp\.arduinoIDE-unsaved2025528-21424-mrpq9p.55lhp\sketch_jun28b\sketch_jun28b.ino:58:47: note: mismatched types 'std::initializer_list<_Tp>' and 'int' int display_count = min(10, block_size); ^ In file included from c:\users\hdhfg\appdata\local\arduino15\packages\esp32\tools\xtensa-esp32-elf-gcc\esp-2021r2-patch5-8.4.0\xtensa-esp32-elf\include\c++\8.4.0\algorithm:62, from C:\Users\hdhfg\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.11\cores\esp32/Arduino.h:172, from C:\Users\hdhfg\AppData\Local\Temp\arduino\sketches\9775FC6C6AD6729580772478E700C403\sketch\sketch_jun28b.ino.cpp:1: c:\users\hdhfg\appdata\local\arduino15\packages\esp32\tools\xtensa-esp32-elf-gcc\esp-2021r2-patch5-8.4.0\xtensa-esp32-elf\include\c++\8.4.0\bits\stl_algo.h:3450:5: note: candidate: 'template<class _Tp> _Tp std::min(std::initializer_list<_Tp>)' min(initializer_list<_Tp> __l) ^~~ c:\users\hdhfg\appdata\local\arduino15\packages\esp32\tools\xtensa-esp32-elf-gcc\esp-2021r2-patch5-8.4.0\xtensa-esp32-elf\include\c++\8.4.0\bits\stl_algo.h:3450:5: note: template argument deduction/substitution failed: C:\Users\hdhfg\AppData\Local\Temp\.arduinoIDE-unsaved2025528-21424-mrpq9p.55lhp\sketch_jun28b\sketch_jun28b.ino:58:47: note: mismatched types 'std::initializer_list<_Tp>' and 'int' int display_count = min(10, block_size); ^ In file included from c:\users\hdhfg\appdata\local\arduino15\packages\esp32\tools\xtensa-esp32-elf-gcc\esp-2021r2-patch5-8.4.0\xtensa-esp32-elf\include\c++\8.4.0\algorithm:61, from C:\Users\hdhfg\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.11\cores\esp32/Arduino.h:172, from C:\Users\hdhfg\AppData\Local\Temp\arduino\sketches\9775FC6C6AD6729580772478E700C403\sketch\sketch_jun28b.ino.cpp:1: c:\users\hdhfg\appdata\local\arduino15\packages\esp32\tools\xtensa-esp32-elf-gcc\esp-2021r2-patch5-8.4.0\xtensa-esp32-elf\include\c++\8.4.0\bits\stl_algobase.h:243:5: note: candidate: 'template<class _Tp, class _Compare> const _Tp& std::min(const _Tp&, const _Tp&, _Compare)' min(const _Tp& __a, const _Tp& __b, _Compare __comp) ^~~ c:\users\hdhfg\appdata\local\arduino15\packages\esp32\tools\xtensa-esp32-elf-gcc\esp-2021r2-patch5-8.4.0\xtensa-esp32-elf\include\c++\8.4.0\bits\stl_algobase.h:243:5: note: template argument deduction/substitution failed: C:\Users\hdhfg\AppData\Local\Temp\.arduinoIDE-unsaved2025528-21424-mrpq9p.55lhp\sketch_jun28b\sketch_jun28b.ino:58:47: note: deduced conflicting types for parameter 'const _Tp' ('int' and 'uint16_t' {aka 'short unsigned int'}) int display_count = min(10, block_size); ^ In file included from c:\users\hdhfg\appdata\local\arduino15\packages\esp32\tools\xtensa-esp32-elf-gcc\esp-2021r2-patch5-8.4.0\xtensa-esp32-elf\include\c++\8.4.0\algorithm:61, from C:\Users\hdhfg\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.11\cores\esp32/Arduino.h:172, from C:\Users\hdhfg\AppData\Local\Temp\arduino\sketches\9775FC6C6AD6729580772478E700C403\sketch\sketch_jun28b.ino.cpp:1: c:\users\hdhfg\appdata\local\arduino15\packages\esp32\tools\xtensa-esp32-elf-gcc\esp-2021r2-patch5-8.4.0\xtensa-esp32-elf\include\c++\8.4.0\bits\stl_algobase.h:195:5: note: candidate: 'template<class _Tp> const _Tp& std::min(const _Tp&, const _Tp&)' min(const _Tp& __a, const _Tp& __b) ^~~ c:\users\hdhfg\appdata\local\arduino15\packages\esp32\tools\xtensa-esp32-elf-gcc\esp-2021r2-patch5-8.4.0\xtensa-esp32-elf\include\c++\8.4.0\bits\stl_algobase.h:195:5: note: template argument deduction/substitution failed: C:\Users\hdhfg\AppData\Local\Temp\.arduinoIDE-unsaved2025528-21424-mrpq9p.55lhp\sketch_jun28b\sketch_jun28b.ino:58:47: note: deduced conflicting types for parameter 'const _Tp' ('int' and 'uint16_t' {aka 'short unsigned int'}) int display_count = min(10, block_size); ^ exit status 1 Compilation error: no matching function for call to 'arduino::esp32::spi::slave::Slave::begin(spi_host_device_t, const int&)' 出现问题,如何修改
06-29
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