Question

使用gcc编译两个clang错误来编译终端中的程序file2.c：

file2.c:8:1: warning: type specifier missing, defaults to 'int' [-Wimplicit-int]
main(){
^
file2.c:22:5: warning: implicit declaration of function 'print' is invalid in
      C99 [-Wimplicit-function-declaration]
    print("This will print to screen \n\n"); 
    ^
2 warnings generated.
Undefined symbols for architecture x86_64:
  "_print", referenced from:
      _main in file2-d54df1.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

两个警告都没问题 - 程序应该仍然运行。究竟是什么错误？

这是程序file2.c：

#include <stdio.h>
#include <string.h>


int globalVar = 100;

main(){

    char firstLetter = 'D';

    int age = 38;

    long int superBigNum = -327670000;

    float piValue = 3.12158;

    double reallyBigPi = 34234324234;

    printf("\n");

    print("This will print to screen \n\n");
}

Answer 1

  main(){
^ int is required here. for warning 1

 print ("This will print to screen \n\n");
      ^ function is printf not print, this is the reason, you are getting linker error, Try fixing it.

两个gcc clang错误，不编译

1 个答案: