c - 在 centos 6.2 上通过 c 发送电子邮件的 Sprintf 错误

Question

我们正在尝试在centos 6.2 平台上通过C 语言发送几封电子邮件。下面是代码。错误是 warning: incompatible implicit declaration of built-in function sprintf.

如何解决这个问题？

#include <stdlib.h>
#include <string.h>

#define cknull(x) if((x)==NULL) {perror(""); exit(EXIT_FAILURE);}
#define cknltz(x) if((x)<0) {perror(""); exit(EXIT_FAILURE);}
#define LIST_LEN 4


void main()                                          
{                                                                       
    char tmp[256]={0x0};                                                
    char fpBuffer[512]={0x0};                                           
    char email_list[LIST_LEN][256]={  {"****@gmail.com"},             
                               {"****@gmail.com"},             
                               {"***@gmail.com"},         
                               {0x0}};                                  
    int i=0;                                                            
    char *filename = "";                                                                    
    for(i=0;*email_list[i]>0x0;i++)                                
    {                                                                   
        cknull(strcpy(tmp, email_list[i]));                             
        cknltz(sprintf (fpBuffer,                                       
            "/usr/bin/mailx -s '%s %s' %s < %s",                        
            "Please Review:",                                           
            filename,                                                   
            tmp,                                                        
            filename));                                                 
        if(system (fpBuffer)==(-1))                                     
        {                                                               
            perror("email failure");                                    
            exit(EXIT_FAILURE);                                         
        }                                                               
    }                                                                   
}

Answer 1

您缺少以下内容:

#include <stdio.h>