search
HomeBackend DevelopmentC++Convert string to uppercase letters in C

Convert string to uppercase letters in C

Aug 30, 2023 pm 09:01 PM
stringConvertuppercase letter

Convert string to uppercase letters in C

这是一个将字符串转换为大写字母的C语言程序示例:

示例

#include <stdio.h>
#include <string.h>
int main() {
   char s[100];
   int i;
   printf("</p><p>Enter a string : ");
   gets(s);
   for (i = 0; s[i]!=&#39;\0&#39;; i++) {
      if(s[i] >= &#39;a&#39; && s[i] <= &#39;z&#39;) {
         s[i] = s[i] -32;
      }
   }
   printf("</p><p>String in Upper Case = %s", s);
   return 0;
}

输出

Enter a string : hello world!
String in Upper Case = HELLO WORLD!

在程序中,字符串转换为大写的实际代码位于main()函数中。声明一个 char 类型的数组 s[100],该数组将存储用户输入的字符串。

然后,使用 for 循环将字符串转换为大写字符串,并使用 if 块检查 if字符为小写,则通过从其 ASCII 值中减去 32 将其转换为大写。

for (i = 0; s[i]!=&#39;\0&#39;; i++) {
   if(s[i] >= &#39;a&#39; && s[i] <= &#39;z&#39;) {
      s[i] = s[i] -32;
   }
}

The above is the detailed content of Convert string to uppercase letters in C. For more information, please follow other related articles on the PHP Chinese website!

Statement
This article is reproduced at:tutorialspoint. If there is any infringement, please contact admin@php.cn delete
The Longevity of C  : Examining Its Current StatusThe Longevity of C : Examining Its Current StatusApr 26, 2025 am 12:02 AM

C is still important in modern programming because of its efficient, flexible and powerful nature. 1)C supports object-oriented programming, suitable for system programming, game development and embedded systems. 2) Polymorphism is the highlight of C, allowing the call to derived class methods through base class pointers or references to enhance the flexibility and scalability of the code.

C# vs. C   Performance: Benchmarking and ConsiderationsC# vs. C Performance: Benchmarking and ConsiderationsApr 25, 2025 am 12:25 AM

The performance differences between C# and C are mainly reflected in execution speed and resource management: 1) C usually performs better in numerical calculations and string operations because it is closer to hardware and has no additional overhead such as garbage collection; 2) C# is more concise in multi-threaded programming, but its performance is slightly inferior to C; 3) Which language to choose should be determined based on project requirements and team technology stack.

C  : Is It Dying or Simply Evolving?C : Is It Dying or Simply Evolving?Apr 24, 2025 am 12:13 AM

C isnotdying;it'sevolving.1)C remainsrelevantduetoitsversatilityandefficiencyinperformance-criticalapplications.2)Thelanguageiscontinuouslyupdated,withC 20introducingfeatureslikemodulesandcoroutinestoimproveusabilityandperformance.3)Despitechallen

C   in the Modern World: Applications and IndustriesC in the Modern World: Applications and IndustriesApr 23, 2025 am 12:10 AM

C is widely used and important in the modern world. 1) In game development, C is widely used for its high performance and polymorphism, such as UnrealEngine and Unity. 2) In financial trading systems, C's low latency and high throughput make it the first choice, suitable for high-frequency trading and real-time data analysis.

C   XML Libraries: Comparing and Contrasting OptionsC XML Libraries: Comparing and Contrasting OptionsApr 22, 2025 am 12:05 AM

There are four commonly used XML libraries in C: TinyXML-2, PugiXML, Xerces-C, and RapidXML. 1.TinyXML-2 is suitable for environments with limited resources, lightweight but limited functions. 2. PugiXML is fast and supports XPath query, suitable for complex XML structures. 3.Xerces-C is powerful, supports DOM and SAX resolution, and is suitable for complex processing. 4. RapidXML focuses on performance and parses extremely fast, but does not support XPath queries.

C   and XML: Exploring the Relationship and SupportC and XML: Exploring the Relationship and SupportApr 21, 2025 am 12:02 AM

C interacts with XML through third-party libraries (such as TinyXML, Pugixml, Xerces-C). 1) Use the library to parse XML files and convert them into C-processable data structures. 2) When generating XML, convert the C data structure to XML format. 3) In practical applications, XML is often used for configuration files and data exchange to improve development efficiency.

C# vs. C  : Understanding the Key Differences and SimilaritiesC# vs. C : Understanding the Key Differences and SimilaritiesApr 20, 2025 am 12:03 AM

The main differences between C# and C are syntax, performance and application scenarios. 1) The C# syntax is more concise, supports garbage collection, and is suitable for .NET framework development. 2) C has higher performance and requires manual memory management, which is often used in system programming and game development.

C# vs. C  : History, Evolution, and Future ProspectsC# vs. C : History, Evolution, and Future ProspectsApr 19, 2025 am 12:07 AM

The history and evolution of C# and C are unique, and the future prospects are also different. 1.C was invented by BjarneStroustrup in 1983 to introduce object-oriented programming into the C language. Its evolution process includes multiple standardizations, such as C 11 introducing auto keywords and lambda expressions, C 20 introducing concepts and coroutines, and will focus on performance and system-level programming in the future. 2.C# was released by Microsoft in 2000. Combining the advantages of C and Java, its evolution focuses on simplicity and productivity. For example, C#2.0 introduced generics and C#5.0 introduced asynchronous programming, which will focus on developers' productivity and cloud computing in the future.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

MinGW - Minimalist GNU for Windows

MinGW - Minimalist GNU for Windows

This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

PhpStorm Mac version

PhpStorm Mac version

The latest (2018.2.1) professional PHP integrated development tool

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor