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分享C++ 调用 exec函数问题
void sql_output(vector<read_info> &reads,const char* db)
{
ofstream out("reads_sql");
int count=reads.size();
for(int i=0;i<count;i++)
{
out<<i+1<<'\t'<<reads[i].name<<'\t'<<reads[i].seq<<'\n';
}
out.close();
exec("perl loaddata.pl "+string(db)+" reads_info");
}
3171 E:\baohua\linux\mapnext_web.cpp `exec' undeclared (first use this function)
缺少 include 吗？
{
ofstream out("reads_sql");
int count=reads.size();
for(int i=0;i<count;i++)
{
out<<i+1<<'\t'<<reads[i].name<<'\t'<<reads[i].seq<<'\n';
}
out.close();
exec("perl loaddata.pl "+string(db)+" reads_info");
}
3171 E:\baohua\linux\mapnext_web.cpp `exec' undeclared (first use this function)
缺少 include 吗？
...全文
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SearchLife 2008-12-16
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up
jiangfeng999 2008-12-16
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用Sytem函数也行,不过会开辟另外一个子进程
wuyu637 2008-12-16
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/* execv example */
#include <process.h>
#include <stdio.h>
#include <errno.h>
void main(int argc, char *argv[])
{
int i;
printf("Command line arguments:\n");
for (i=0; i<argc; i++)
printf("[%2d] : %s\n", i, argv[i]);
printf("About to exec child with arg1 arg2 ...\n");
execv("CHILD.EXE", argv);
perror("exec error");
exit(1);
}
#include <process.h>
#include <stdio.h>
#include <errno.h>
void main(int argc, char *argv[])
{
int i;
printf("Command line arguments:\n");
for (i=0; i<argc; i++)
printf("[%2d] : %s\n", i, argv[i]);
printf("About to exec child with arg1 arg2 ...\n");
execv("CHILD.EXE", argv);
perror("exec error");
exit(1);
}
baohua100 2008-12-16
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自己 解决了
#include <unistd.h>
execl()
#include <unistd.h>
execl()
baohua100 2008-12-16
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加了 #include <process.h>
还是同样错误。 怎么回事？
g++ -o map mapnext_web.cpp
`exec' undeclared (first use this function)
还是同样错误。 怎么回事？
g++ -o map mapnext_web.cpp
`exec' undeclared (first use this function)
lann64 2008-12-16
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process.h
