C++ to C ????? i need help guys T.T I want to convert it to c but i cant

    #include<stdio.h>
#include<conio.h>

typedef struct process{
    char pname[20];
    int at,bt,wt,ta,end;
}processes;

int main(){
    processes P[10];
    processes z[10];
    processes et[10];
    processes wt1[10];
    processes ta1[10];
    int a,b,n,x=0,st,y,w;
    float aveta,avewt,sumta=0,sumwt=0;
    printf("Process Scheduling Algorithm:\n");
    printf("SHORTEST JOB FIRST\n");
    printf("--------------------------------------\n");
    printf("Enter No. of Process: ");
    scanf("%d",&n);
    printf("\n");

    for(a=0;a<n;a++){
        printf("Enter Process Name P[%d]: ",a+1);
        scanf("%s",&P[a].pname);
    }

    printf("\n");

    for(a=0;a<n;a++){
        printf("Enter Arrival Time for P[%d]: ",a+1);
        scanf("%d",&P[a].at);
    }
    for(a=0; a<n; a++)
    {
        if(st > P[a].at)
        {
            st = P[a].at;

        }   
    }

    printf("\n");
    for(a=0;a<n;a++){
        printf("Enter Burst Time for P[%d]: ",a+1);
        scanf("%d",&P[a].bt);
    }
    printf("\n\n ========================================================================\n");
    printf("||\tPROCESS \t||\t ARRIVAL TIME \t||\t BURST TIME \t||\n");
    printf("||----------------------------------------------------------------------||\n");
    for(a=0;a<n;a++){
    printf("||\t P[%s] \t\t||\t  %d \t\t||\t  %d \t\t||\n",P[a].pname,P[a].at,P[a].bt);
    }
    printf(" ========================================================================\n");

    for(a=0;a<n;a++){
        z[a]=P[a];
        et[a]=P[a];
    }

    processes t;

    for(a=1;a<n;a++)
        for(b=0;b<n-a;b++){
            if(z[b].at > z[b+1].at){
                t = z[b];
                z[b] = z[b+1];
                z[b+1] = t;
            }
        }

    for(a=2;a<n;a++)
        for(b=1;b<n-a+1;b++){
            if(z[b].bt > z[b+1].bt){
                t = z[b];
                z[b] = z[b+1];
                z[b+1] = t;
            }
        }

    for(a=0;a<n;a++){
            x+=z[a].bt;
        }

    printf("\n GANTT CHART: \n");

        if(st>0){
        for(a=0;a<n;a++){
            if(st!=0){
                x=st+z[a].bt;
                printf("0\tIDLE\t%d\tP[%s]\t%d\t",st,z[a].pname,x);
                st=0;
                y=x;
                et[a].end=x;
                ta1[a].ta=et[a].end-z[a].at;
                wt1[a].wt=ta1[a].ta-z[a].bt;
            }
            else{
                y=y+z[a].bt;
                w=w+z[a].bt;
                w=y;
                printf("P[%s]\t%d\t",z[a].pname,y);
                y=w;
                et[a].end=y;
                ta1[a].ta=et[a].end-z[a].at;
                wt1[a].wt=ta1[a].ta-z[a].bt;
            }
        }
    }
    else{
        printf("0\t");
        for(a=0;a<n;a++){
                y=y+z[a].bt;
                w=w+z[a].bt;
                w=y;
                printf("P[%s]\t%d\t",z[a].pname,y);
                y=w;
                et[a].end=y;
                ta1[a].ta=et[a].end-z[a].at;
                wt1[a].wt=ta1[a].ta-z[a].bt;
            }

    }

    printf("\n\n ========================================================================\n");
    printf("||   PROCESS \t||   END TIME \t|| TURN AROUND T.\t|| WAITING TIME\t||\n");
    printf("||----------------------------------------------------------------------||\n");
    for(a=0;a<n;a++){
    printf("||  P[%s] \t||    %d \t||      %d \t\t||  %d \t\t|| \n",z[a].pname,et[a].end,ta1[a].ta,wt1[a].wt);
    sumta+=ta1[a].ta;
    sumwt+=wt1[a].wt;
    }
    printf(" =========================================================================\n");
    aveta=sumta/n;
    avewt=sumwt/n;
    printf("\n Average Turn Around Time: %.2f",aveta);
    printf("\n Average Waiting Time: %.2f",avewt);
getch();
return 0;
}