C++ 程序不知道问题出来哪里？望高手指教

void f5(int x)
{if(k==0)
printf("暂时还没有学生的记录信息。");
else
{
int n,m;
char t;
printf("1.按学号查询:\n2.按姓名查询:");
scanf("%d",n);
if(n==1)
{printf("学号：");
scanf("%d",&m)
for(i=0;i<5;i++)
if(m==stu[i].num)
{ i++;
switch(i)
{case 1:printf("姓名:%s\t学号：%d\tMATH:%d\tC:%d\tENGLISH:%d",stu[0].name,stu[0].num,stu[0].score[0],stu[0].score[1],stu[0].score[2]);break;
case 2:printf("姓名:%s\t学号：%d\tMATH:%d\tC:%d\tENGLISH:%d",stu[1].name,stu[1].num,stu[1].score[0],stu[1].score[1],stu[1].score[2]);break;
case 3:printf("姓名:%s\t学号：%d\tMATH:%d\tC:%d\tENGLISH:%d",stu[2].name,stu[0].num,stu[2].score[0],stu[2].score[1],stu[2].score[2]);break;
case 4:printf("姓名:%s\t学号：%d\tMATH:%d\tC:%d\tENGLISH:%d",stu[3].name,stu[0].num,stu[3].score[0],stu[3].score[1],stu[3].score[2]);break;
case 5:printf("姓名:%s\t学号：%d\tMATH:%d\tC:%d\tENGLISH:%d",stu[4].name,stu[0].num,stu[4].score[0],stu[4].score[1],stu[4].score[2]);break;}
}
else
printf("无此学号.");
}
else
{ printf("姓名：");gets(t);

for(i=0;i<5;i++)
if(strcmp(t,stu[i].num)==0)
{ i++;
switch(i)
{case 1:printf("姓名:%s\t学号：%d\tMATH:%d\tC:%d\tENGLISH:%d",stu[0].name,stu[0].num,stu[0].score[0],stu[0].score[1],stu[0].score[2]);break;
case 2:printf("姓名:%s\t学号：%d\tMATH:%d\tC:%d\tENGLISH:%d",stu[1].name,stu[1].num,stu[1].score[0],stu[1].score[1],stu[1].score[2]);break;
case 3:printf("姓名:%s\t学号：%d\tMATH:%d\tC:%d\tENGLISH:%d",stu[2].name,stu[0].num,stu[2].score[0],stu[2].score[1],stu[2].score[2]);break;
case 4:printf("姓名:%s\t学号：%d\tMATH:%d\tC:%d\tENGLISH:%d",stu[3].name,stu[0].num,stu[3].score[0],stu[3].score[1],stu[3].score[2]);break;
case 5:printf("姓名:%s\t学号：%d\tMATH:%d\tC:%d\tENGLISH:%d",stu[4].name,stu[0].num,stu[4].score[0],stu[4].score[1],stu[4].score[2]);break;}
}

}

}

}

--------------------Configuration: 12 - Win32 Debug--------------------
Compiling...
12.cpp
f:\学习\c++\c++作业\大作业 一题\5.h(13) : error C2664: 'strcmp' : cannot convert parameter 1 from 'int' to 'const char *'
Conversion from integral type to pointer type requires reinterpret_cast, C-style cast or function-style cast
f:\学习\c++\c++作业\大作业 一题\5.h(13) : error C2018: unknown character '0xa1'
f:\学习\c++\c++作业\大作业 一题\5.h(13) : error C2018: unknown character '0xac'
f:\学习\c++\c++作业\大作业 一题\5.h(13) : error C2146: syntax error : missing ')' before identifier 'strcmp'
f:\学习\c++\c++作业\大作业 一题\5.h(13) : error C2664: 'strcmp' : cannot convert parameter 1 from 'int' to 'const char *'
Conversion from integral type to pointer type requires reinterpret_cast, C-style cast or function-style cast
f:\学习\c++\c++作业\大作业 一题\5.h(13) : error C2059: syntax error : ')'
f:\学习\c++\c++作业\大作业 一题\5.h(14) : error C2143: syntax error : missing ';' before '{'
问题指向为图示位置。