How to compile linux

How to compile Linux?

Compile and run C program under Linux

1. Execute vim demo.c to write C language file

Recommendation: " Linux tutorial》

#include<stdio.h>
int add(int,int);
int add(int num1,int num2)
{
        return num1+num2;          
}
void main()
{
        int res=0;
        res = add(2,3);
        printf("%d\n",res);
        printf("哈哈\n");
}

2. After writing: wq save and exit, enter gcc -o demo demo.c (PS: By default, after the compilation is successfully completed, it will be in the current path, Generate a file named a.out, and then execute ./a.out to print the results, but you can usually specify your own executable program name through the option -o;)

3. Compilation completed successfully Finally, generate a file named hello under the current path, and then execute ./demo to see the output 5 and haha.

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